Short Standard International Ink Cartridge Guide

Short Standard International Ink Cartridge, a 38 mm fountain pen cartridge used by many pens that accept short international cartridges.

For the longer version, see the Long International Fountain Pen Ink Cartridge guide.

Not sure this is the right cartridge? Use the Pen Refill Finder to compare cartridge size, format, and compatibility.

Buy Short Standard International Ink Cartridges

Trusted Everyday Options:

Color-Focused Ink Options

Specialty & Assorted Packs

Buy Diamine Standard Ink Cartridges (20-Pack Assorted): Fiesta, Sovereign, Prestige, Floral, Regal
Buy Schneider Standard Ink Cartridges (Pastel Colors): Ice Blue, Pink Blush, Rose Red, Apricot Orange, Cognac Brown, Lemon Cake

Some budget or generic cartridges are advertised as “international,” “universal,” or “Euro fit,” but not all of them are true short standard international cartridges. Confirm the 38 mm length and approximately 2.4 mm opening before ordering.

Quick Specs

Specification	Details
Common Format Name	Short Standard International Fountain Pen Ink Cartridge
Other Common Names	Short international cartridge, standard international short cartridge, mini international cartridge, universal ink cartridge, Euro-fit ink cartridge, short fountain pen cartridge
Cartridge Category	Fountain pen ink cartridge
Cartridge Format	Short standard international
Ink Type	Fountain pen ink
Length	Approximately 38 mm
Short or Long	Short / mini international cartridge
Bore / Opening	Approx. 2.4 mm standard-international opening; confirm cartridge shape, sealing point, and pen compatibility rather than relying on bore size alone
Converter Alternative	Mini international converter or standard international converter, depending on pen model and barrel clearance
Common Ink Colors	Black, blue, blue-black, red, green, purple, turquoise, brown, and many specialty colors depending on ink brand
Common Compatible Pens	Many cartridge/converter fountain pens from Kaweco, Pelikan, Schneider, Monteverde, Diplomat, Faber-Castell, Ohto, Retro 51, rOtring, Waterman, and other brands using short international cartridges
Similar To	Long international fountain pen ink cartridges, Waterman short cartridges, many European short ink cartridges
Not Compatible With	Pilot/Namiki cartridges, Lamy T10 cartridges, Parker Quink cartridges, Platinum cartridges, Sailor cartridges, Sheaffer Classic cartridges, Cross proprietary cartridges, Zebra V-301 cartridges, 2.6 mm Chinese cartridges unless specifically supported, 3.4 mm Chinese cartridges

Short Standard International Fountain Pen Ink Cartridge Overview

The Short Standard International Ink Cartridge is one of the most common fountain pen cartridge formats. It is a short 38 mm ink cartridge used by many cartridge/converter fountain pens, especially European and international-standard fountain pen models.

This cartridge is often called a short standard international ink cartridge, short international cartridge, standard international short cartridge, mini international cartridge, or simply a standard fountain pen cartridge. These names usually refer to the same basic 38 mm cartridge format. These cartridges are also sometimes described as “universal” cartridges or “Euro-fit” cartridges, especially in retail listings, but those terms should still be checked against the actual 38 mm length and approximately 2.4 mm standard-international opening.

The most important identification points are the 38 mm length and the approximately 2.4 mm standard-international opening. A true short standard international cartridge is not the same as a 2.6 mm or 3.4 mm cartridge, even if the package uses loose wording such as “international” or “universal.”

This format is commonly used by many pens from brands such as Kaweco, Pelikan, Schneider, Monteverde, Diplomat, Faber-Castell, Ohto, Retro 51, rOtring, Waterman, and many others. However, compatibility is still model-dependent. Some brands make multiple filling systems, including piston-fill pens, proprietary cartridge pens, compact pens, and discontinued models.

Why Choose Short Standard International Fountain Pen Ink Cartridges?

Choose a Short Standard International Ink Cartridge if your fountain pen accepts short international cartridges and you want a simple, widely available ink replacement.

The main advantage is availability. Short international cartridges are made by many pen and ink brands, which gives users more color, ink-flow, and price options than many proprietary cartridge systems.

This format is also useful for compact fountain pens. Many small pens, pocket pens, and cartridge/converter pens can accept short international cartridges even when they do not have enough barrel space for a long cartridge or full-size converter.

Short standard international ink cartridges are also convenient. They are pre-filled, easy to carry, simple to install, and cleaner than filling from a bottle.

Writing Characteristics

A Short Standard International Fountain Pen Ink Cartridge describes the cartridge format, not one specific ink formula. Writing characteristics depend on the ink brand, ink color, nib, feed, and paper.

For example, a Kaweco short cartridge, Pelikan 4001 short cartridge, Monteverde short cartridge, Diamine short cartridge, and Private Reserve short cartridge may all fit the same pen but write differently. One ink may feel wetter, drier, smoother, more saturated, faster-drying, or more shading than another.

Because this is a fountain pen cartridge, the cartridge supplies ink while the nib and feed control much of the writing experience. Flow, line width, smoothness, shading, and dry time can all change depending on the pen and paper combination.

Short Standard International Cartridge Compatibility Notes

The Short Standard International Fountain Pen Ink Cartridge is a widely used format, but it is not universal.

The standard short international ink cartridge is commonly around 38 mm long with an approximately 2.4 mm opening. That opening is an important compatibility feature because the cartridge must seal securely onto the pen’s feed nipple. If the cartridge opening is too large, too small, or shaped incorrectly, the cartridge may leak, fit loosely, fail to seat, or stop ink from flowing properly.

For compatibility, check:

Cartridge length
Cartridge opening
Sealing point
Shoulder shape
Cartridge body diameter
Pen brand
Pen model
Barrel clearance
Whether the pen is designed for short international ink cartridges

A short standard international cartridge is a common format, but the safest approach is still to confirm your specific pen model.

Pen Brands That Commonly Use Short Standard International Fountain Pen Ink Cartridges

Many fountain pen brands make cartridge/converter pens that commonly use short standard international ink cartridges. The table below gives practical compatibility guidance, but the specific pen model still matters.

Pen Brand	Compatibility Confidence	Notes
Kaweco	Very common	Many Kaweco cartridge pens, including many Sport-style models, use short standard international ink cartridges because of their compact barrels.
Pelikan	Common in cartridge/converter models	Many Pelikan cartridge pens use standard international cartridges, but Pelikan piston-fill models do not use cartridges.
Schneider	Common	Many Schneider fountain pens and cartridge-based school pens use standard cartridge systems.
Monteverde	Common	Many Monteverde fountain pens use short standard international ink cartridges and converters.
Diplomat	Common	Many Diplomat cartridge/converter fountain pens use short standard international ink cartridges.
Faber-Castell	Common	Many Faber-Castell cartridge/converter fountain pens use standard international cartridges.
Ohto	Common in cartridge models	Many Ohto fountain pens are listed with short standard international ink cartridge compatibility, but confirm by model.
Retro 51	Common in compatible fountain pens	Retro 51 fountain pens are commonly listed with standard international cartridge/converter compatibility.
rOtring	Common in cartridge models	Many rOtring cartridge fountain pens use standard cartridges, but several models are discontinued, so confirm by model.
Waterman	Common for short cartridges	Waterman short cartridges are generally treated as short standard international cartridges, but Waterman also makes longer cartridges and some model-specific systems.
Caran d’Ache	Common in many cartridge/converter models	Many Caran d’Ache fountain pens use international-style cartridges, but confirm by pen model.
Visconti	Common in many cartridge/converter models	Many Visconti cartridge/converter pens use short standard international ink cartridges, while some models may use other filling systems.
Conklin	Common	Many Conklin cartridge/converter pens use standard international cartridges.
Stipula	Common in cartridge/converter models	Many Stipula pens use standard international cartridges or converters, but model confirmation is still important.

Ink Brands That Make Short Standard International Fountain Pen Ink Cartridges

Many ink brands make short standard international ink cartridges. Some of these companies also make fountain pens, while others are primarily known for ink.

Ink Brand	Also Makes Pens?	Notes
Kaweco	Yes	Kaweco short cartridges are a common choice for Kaweco Sport-style pens and other short international-compatible pens.
Pelikan	Yes	Pelikan 4001 short cartridges are widely used short international cartridges.
Schneider	Yes	Schneider standard cartridges are common in school, office, and everyday fountain pens that use the standard cartridge system.
Monteverde	Yes	Monteverde short standard international ink cartridges are commonly available in multiple colors.
Faber-Castell	Yes	Faber-Castell standard cartridges are often used in Faber-Castell pens and other standard international-compatible pens.
Diamine	Primarily ink	Diamine short standard international ink cartridges are popular for users who want a wider range of colors.
Private Reserve	Primarily ink	Private Reserve cartridges are commonly sold in short standard international ink cartridge format with specialty color options.
J. Herbin	Primarily ink	J. Herbin short cartridges are widely used for color variety and traditional fountain pen inks.
Generic / private-label cartridges	Varies	Use caution. Some generic cartridges are true short standard international ink cartridges, while others may use 2.6 mm or 3.4 mm openings intended for different pens.

Short Standard International vs Long International Fountain Pen Ink Cartridges

Short and long international cartridges belong to the same general international cartridge family, but they are not the same size.

Cartridge Format	Approx. Length	Common Use	Key Note
Short Standard International Fountain Pen Ink Cartridge	38 mm	Compact pens, pocket pens, many cartridge/converter pens	Most flexible size; often fits pens that cannot accept long cartridges.
Long International Fountain Pen Ink Cartridge	70-73 mm	Full-size cartridge/converter pens with enough barrel space	Holds more ink, but does not fit many compact pens.

A pen that accepts short international cartridges does not always accept long international cartridges. Compact pens, pocket pens, and slim barrels may only have room for the short version.

Some full-size pens can carry one installed short standard international ink cartridge and one spare short cartridge behind it in the barrel. That is pen-dependent and should not be assumed for compact or unusually shaped pens.

Waterman Short Cartridges and Standard International Fit

Waterman short cartridges are generally treated as short standard international ink cartridges. They are commonly around 38 mm long and can often be used in pens that accept short international cartridges.

This makes Waterman short cartridges an important bridge between Waterman’s cartridge system and the broader standard international cartridge family.

However, Waterman also sells longer cartridges, and some older, slimmer, compact, or discontinued Waterman pens may have model-specific fit considerations. If you are replacing ink in a Waterman pen, confirm whether your pen uses the short international-style cartridge, the longer Waterman Fountain Pen Ink Cartridge, or a Waterman converter.

Be Careful With Generic “International” Cartridges

Some cartridges are advertised as “international,” “universal,” “Euro fit,” or “standard size,” but those terms are not always used carefully.

A true Short Standard International Fountain Pen Ink Cartridge is commonly around 38 mm long with an approximately 2.4 mm standard-international opening.

Some generic or Chinese-market cartridges use 2.6 mm or 3.4 mm bore descriptions. Those cartridges may fit certain Chinese pens or proprietary cartridge systems, but they should not automatically be treated as short standard international cartridges.

A 2.6 mm cartridge may be close enough for certain pens that use that specific format, but it is not the same as the traditional 2.4 mm short standard international opening. A 3.4 mm cartridge belongs to a larger-bore category and is especially risky to treat as a standard international replacement.

When buying generic cartridges for short standard international ink cartridge compatibility, check:

38 mm short length
Approx. 2.4 mm standard-international opening
Cartridge body shape
Shoulder shape
Whether the listing specifically says short standard international ink cartridge
Whether your pen maker confirms compatibility

If the listing only says “universal” without clear size or format details, use caution.

Brands and Cartridges That Are Not Short Standard International

Many major pen brands use proprietary fountain pen cartridges. These cartridges may look similar at a glance, but they are not short standard international ink cartridges.

Cartridge Family	Why It Is Different
Lamy T10 Fountain Pen Ink Cartridge	Proprietary Lamy cartridge with a larger Lamy-style opening and different shape.
Parker Quink Long Ink Cartridge	Proprietary Parker/Aurora-style cartridge, longer and larger-bore than short international.
Parker Quink Mini Ink Cartridge	Similar 38 mm length, but proprietary Parker mini format, not short international.
Pilot Fountain Pen Ink Cartridge	Proprietary Pilot/Namiki cartridge with a wide opening commonly estimated around 6 mm.
Sheaffer Fountain Pen Ink Cartridge	Classic Sheaffer proprietary cartridge; Sheaffer VFM is a notable standard-international-style exception.
Cross Standard Fountain Pen Ink Cartridge	Proprietary Cross standard cartridge, not standard international despite the word “standard.”
Cross Slim Fountain Pen Ink Cartridge	Proprietary Cross slim cartridge for select slim Cross fountain pens.
Zebra V-301 Fountain Pen Ink Cartridge	Proprietary Zebra cartridge with a larger-bore opening around 3.4 mm.
Platinum cartridge	Proprietary Platinum cartridge system.
Sailor cartridge	Proprietary Sailor cartridge system.

Compatible Pens

The Short Standard International Fountain Pen Ink Cartridge is used in many cartridge/converter fountain pens that follow the short international cartridge format.

Common compatible pen categories include:

Many Kaweco cartridge fountain pens
Many Pelikan cartridge/converter fountain pens
Many Schneider cartridge fountain pens
Many Monteverde cartridge/converter fountain pens
Many Diplomat cartridge/converter fountain pens
Many Faber-Castell cartridge/converter fountain pens
Many Ohto cartridge fountain pens
Many Retro 51 fountain pens
Many rOtring cartridge fountain pens
Many Waterman pens that accept short international cartridges
Many independent and boutique cartridge/converter fountain pens
Pens specifically listing short standard international cartridge compatibility
Pens specifically listing standard international cartridge compatibility

Do not assume every pen from a compatible brand uses the short standard international ink cartridge. Some pens use proprietary cartridges, piston fillers, vacuum fillers, eyedropper systems, or converters only.

Compatible Brands

The Short Standard International Fountain Pen Ink Cartridge is a format used across many pen brands, but compatibility should still be checked by model.

Brands and cartridge families to compare include:

Kaweco
Pelikan
Schneider
Monteverde
Diplomat
Faber-Castell
Ohto
Retro 51
rOtring
Waterman short cartridges
Caran d’Ache cartridge/converter pens
Visconti cartridge/converter pens
Conklin cartridge/converter pens
Stipula cartridge/converter pens

Compatibility outside clearly listed short standard international pens should be confirmed before ordering.

Alternative Cartridges and Ink Options

The safest replacement for a Short Standard International Fountain Pen Ink Cartridge is another short standard international ink cartridge in the same format.

Popular replacements and comparisons include:

Kaweco short standard international ink cartridges
Pelikan 4001 short standard international fountain pen ink cartridges
Schneider short standard international ink cartridge
Monteverde short standard international ink cartridges
Faber-Castell standard cartridges
Diamine short standard international cartridges
Private Reserve short standard international ink cartridges
J. Herbin short standard international ink cartridges
Waterman short ink cartridges
Generic short standard international ink cartridges, when specifications are clear
Long International Fountain Pen Ink Cartridge, when the pen has enough barrel space
Mini international converter, if supported by the pen
Bottled fountain pen ink with a compatible converter

Before choosing a substitute, use the Pen Refill Size Guide to compare cartridge format, opening, length, shoulder shape, sealing point, and pen compatibility.

Cartridge Family

The Short Standard International Fountain Pen Ink Cartridge belongs to the international fountain pen cartridge family. It is the short 38 mm version of the international cartridge format.

This family is separate from many proprietary systems, including Pilot/Namiki, Lamy, Parker, Platinum, Sailor, classic Sheaffer, Cross, Zebra V-301, and other brand-specific cartridges.

The key identifying features are the 38 mm length, approximately 2.4 mm standard-international opening, small cartridge body, and broad use across many cartridge/converter fountain pens.

How to Identify a Short Standard International Fountain Pen Ink Cartridge

The Short Standard International Fountain Pen Ink Cartridge is best identified by its short length, standard-international opening, and broad compatibility with international-cartridge fountain pens.

Key identification points:

Approximately 38 mm long
Short / mini cartridge format
Approx. 2.4 mm standard-international opening
Used by many international-cartridge fountain pens
Available from many ink brands
Commonly sold in packs of 6 or more
Often labeled short international, standard international short, mini international, or standard cartridge
May be used by many Kaweco, Pelikan, Schneider, Monteverde, Diplomat, Faber-Castell, Ohto, Retro 51, rOtring, and Waterman short-cartridge pens
Not the same as a 2.6 mm Chinese cartridge unless the pen specifically uses that format
Not the same as a 3.4 mm Chinese cartridge
Not a Pilot/Namiki cartridge
Not a Lamy T10 cartridge
Not a Parker cartridge
Not a Platinum cartridge
Not a Sailor cartridge
Not a classic Sheaffer cartridge
Not a Cross proprietary cartridge
Not a Zebra V-301 cartridge

Do not identify this cartridge by length alone. Some proprietary cartridges may also be short or compact, including the 38 mm Parker Quink Mini Ink Cartridge. The opening, shoulder shape, sealing point, and pen compatibility matter just as much as length.

Not sure if this is your cartridge? Check the Pen Refill Finder to compare size, shape, and compatibility before ordering.

Frequently Asked Questions

What is a Short Standard International Fountain Pen Ink Cartridge?

A Short Standard International Ink Cartridge is a 38 mm fountain pen cartridge used by many cartridge/converter fountain pens that accept the short international cartridge format.

What size is a Short Standard International Fountain Pen Ink Cartridge?

A Short Standard International Ink Cartridge is approximately 38 mm long.

What is the bore opening of a Short Standard International Ink Cartridge?

A Short Standard International Fountain Pen Ink Cartridge commonly has an approximately 2.4 mm standard-international opening. Compatibility still depends on the full cartridge shape, sealing point, and pen model.

Is a short international cartridge the same as a mini international cartridge?

Usually yes. “Short international,” “standard international short,” and “mini international” are often used to describe the same 38 mm cartridge format.

Is a short standard international ink cartridge the same as a universal cartridge?

Sometimes. Many retailers use “universal cartridge” to describe short standard international ink cartridges, but the term is not precise. Confirm that the cartridge is approximately 38 mm long with an approximately 2.4 mm standard-international opening before assuming compatibility.

What does Euro-fit ink cartridge mean?

“Euro fit” is another term sometimes used for standard international fountain pen cartridges. It usually refers to the same general short international cartridge format, but compatibility should still be confirmed by cartridge size, opening, and pen model.

What pens use Short Standard International Fountain Pen Ink Cartridges?

Many cartridge/converter fountain pens from brands such as Kaweco, Pelikan, Schneider, Monteverde, Diplomat, Faber-Castell, Ohto, Retro 51, rOtring, Waterman, and others use short standard international ink cartridges. Always confirm by pen model.

Do most Kaweco fountain pens use short standard international cartridges?

Many Kaweco cartridge fountain pens, especially compact Sport-style models, use short standard international ink cartridges. However, always confirm your exact Kaweco model before ordering.

Do Pelikan fountain pens use short standard international ink cartridges?

Many Pelikan cartridge/converter fountain pens use short standard international ink cartridges, but Pelikan also makes piston-fill fountain pens that do not use cartridges.

Are Waterman short cartridges standard international?

Waterman short cartridges are generally treated as short standard international ink cartridges. However, Waterman also makes longer cartridges, and some Waterman pens may have model-specific compatibility requirements.

Can I use a long international cartridge instead of a short standard international ink cartridge?

Only if the pen has enough internal barrel space and accepts long international cartridges. Many pens that accept short standard international ink cartridges do not have room for the long version.

Can I use two short international cartridges in one pen?

Some full-size fountain pens allow one short standard international ink cartridge to be installed and a second short cartridge to be stored behind it as a spare. This depends on the pen’s barrel length and internal design.

Are all “universal” fountain pen cartridges short standard international?

No. Some listings use words like “universal,” “standard,” or “international” loosely. Confirm that the cartridge is approximately 38 mm long and uses the approximately 2.4 mm standard-international opening.

Are 2.6 mm cartridges standard international?

Not necessarily. Many 2.6 mm cartridges are associated with certain Chinese-market pens and should not automatically be treated as short standard international ink cartridges.

Are 3.4 mm cartridges standard international?

No. A 3.4 mm cartridge is a larger-bore cartridge format and should not be treated as a short standard international ink cartridge replacement unless the pen specifically requires that size.

Is the Parker Quink Mini Ink Cartridge a short standard international cartridge?

No. The Parker Quink Mini Ink Cartridge is also approximately 38 mm long, but it is a proprietary Parker mini cartridge. Same length does not mean same cartridge format.

Is the Lamy T10 cartridge a short standard international ink cartridge?

No. The Lamy T10 Fountain Pen Ink Cartridge is a proprietary Lamy cartridge and is longer than a short standard international ink cartridge.

Is the Pilot cartridge a short standard international ink cartridge?

No. Pilot/Namiki cartridges use a proprietary wide-opening format and are not a short standard international ink cartridge.

What is the best alternative to a Short Standard International Fountain Pen Ink Cartridge?

The best replacement is another true short standard international ink cartridge from a reputable ink brand. Popular options include Kaweco, Pelikan, Schneider, Monteverde, Faber-Castell, Diamine, Private Reserve, J. Herbin, Waterman short cartridges, and other clearly labeled short international cartridges.

Short Standard International Fountain Pen Ink Cartridge
Long International Fountain Pen Ink Cartridge
Waterman Fountain Pen Ink Cartridge
Lamy T10 Fountain Pen Ink Cartridge
Parker Quink Long Ink Cartridge
Parker Quink Mini Ink Cartridge
Pilot Fountain Pen Ink Cartridge
Sheaffer Fountain Pen Ink Cartridge
Cross Standard Fountain Pen Ink Cartridge
Cross Slim Fountain Pen Ink Cartridge
Zebra V-301 Fountain Pen Ink Cartridge

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