Glossary · Staple length
Staple length: why it matters
The most important property of cotton almost never appears on the label. It is the length of the individual fibre.
Every cotton thread is made of thousands of short fibres held together by twist. The longer the fibres, the more they overlap one another and the stronger and smoother the thread can be – even when it is very fine.
Categories
The classification of American cotton distinguishes these staple-length groups:
| Category | Inches | Millimetres |
|---|---|---|
| Very short | under 0.25 | under 6.4 |
| Short | 0.25 – 0.94 | 6.4 – 23.9 |
| Medium | 0.94 – 1.13 | 24 – 29 |
| Long | 1.13 – 1.38 | 29 – 35 |
| Extra long | over 1.38 | over 35 |
The International Cotton Advisory Committee (ICAC) sets the threshold for extra-long staple at 1 3/8 inches, or 35 mm.
In practice: according to Cotton Incorporated, regular Upland cotton (Gossypium hirsutum) has a staple of roughly 7/8 to 15/16 of an inch, American Pima (Gossypium barbadense) 1¼ to 1 9/16 inches. Egyptian cotton belongs to the same species as Pima; most of its varieties are extra-long staple, some are long staple.
What length changes
- Fineness of the yarn. Long fibre can be spun into a finer thread without losing strength.
- Smoothness. Fewer fibre ends stick out of the thread, so the fabric is smoother and less "hairy".
- Pilling. Short fibres work loose more easily and tangle into pills.
- Strength and lifespan. A longer overlap between fibres makes a stronger thread that survives more washing.
Why you won't find it on the label
Staple length is measured on raw cotton before processing. On a finished product it can only be measured in a laboratory, and indirectly. That is why packaging shows the origin ("Egyptian", "pima") or the thread count instead. Both are only indirect and sometimes misleading signals. The best guide remains a verified origin trademark and a straight answer from the manufacturer.
Fabric passport
Egyptian cotton
Gossypium barbadense
- Origin
- Egypt, mainly the Nile Delta
- Fibre
- Long-staple and extra-long-staple cotton (Giza varieties)
- Type
- natural plant fibre
- Feel
- Smooth and fine, with a subtle lustre when spun into a fine yarn
- Breathability
- High – the cellulose fibre absorbs moisture and breathes well
- Durability
- High – long fibres make a yarn that is both fine and strong
- Best for
- Bed linen, shirts, towels
- Care
- Usually machine washable; depends on the weave, finish and dye – follow the label
Relative tendencies how we rate
An Egyptian origin does not by itself guarantee extra-long staple: Egypt also grows long-staple varieties. What matters is the variety, the yarn and the weave.
Regular cotton
Gossypium hirsutum
- Origin
- Worldwide – most of the world’s production
- Fibre
- Upland-type fibre – shorter than the long-staple species
- Type
- natural plant fibre
- Feel
- Pleasant and more matt; softness depends heavily on the yarn and finish
- Breathability
- High
- Durability
- Medium
- Best for
- Everyday clothing, bed linen, towels
- Care
- Usually machine washable; may shrink at high temperatures and in the tumble dryer
Relative tendencies how we rate
The most widely grown type of cotton. Well-made regular cotton can feel nicer than badly made “premium” cotton.
Compared
| Property | Egyptian cotton | Pima / Supima | Regular cotton |
|---|---|---|---|
| Softness | 5/5 | 5/5 | 3/5 |
| Breathability | 4/5 | 4/5 | 4/5 |
| Warmth | 2/5 | 2/5 | 2/5 |
| Drying speed | 2/5 | 2/5 | 2/5 |
| Durability | 4/5 | 4/5 | 3/5 |
| Easy care | 4/5 | 4/5 | 4/5 |
| Tendency to crease | 3/5 | 3/5 | 3/5 |
Care
- Short fibres work loose from the surface of a fabric sooner – remove pills with a fabric shaver rather than pulling them off.
The label on the individual product always takes precedence.
Sources
- Cotton Incorporated – The Classification of Cotton
- Staple (textiles) – USDA categories and the ICAC threshold
Last checked . First published 12 October 2026. Editorial policy · Report an error