Supima vs Pima vs Egyptian vs Xinjiang: Long-Staple Cotton for Bedding, Explained

For wholesale bedding, spec the fiber, not the flag. Supima and Egyptian Giza are both extra-long-staple (ELS) cottons above roughly 35 mm; genuine Pima and top-grade Xinjiang are long-staple and very close in feel. Choose by verified staple length, strength and combed yarn, and demand certification, because most 'Egyptian cotton' claims are never verified.

What 'staple length' actually means

Staple is the length of the cotton fiber, and it is the single quality metric that most shapes how a finished sheet feels and wears. Graders report it as the upper half mean length (UHM), the average length of the longest 50 percent of fibers in a sample. Longer fibers spin into finer, stronger, smoother yarn with fewer protruding fiber ends, which is why long-staple bedding feels softer and pills far less than commodity cotton.

The USDA and the International Cotton Advisory Committee (ICAC) sort cotton into staple classes. In round numbers: short is under about 24 mm, medium is roughly 24 to 28 mm, long is about 29 to 35 mm, and extra-long-staple (ELS) is 1 3/8 inches (35 mm) or longer. The base grade for U.S. upland staple is 34/32 of an inch, about 1.06 inches. That single threshold, ELS at 35 mm, separates true luxury cotton from ordinary cotton.

• Longer staple, fewer fiber ends, so smoother hand-feel and less pilling.
• Longer staple spins finer, high-count combed yarn without sacrificing strength.
• Fiber strength (grams/tex) and fineness (micronaire) matter alongside length.
• Combing removes short fibers, so 'combed long-staple' beats plain carded cotton at the same origin.

The two cotton species behind the names

Nearly all premium bedding traces back to Gossypium barbadense, the extra-long-staple species that includes American Pima, Supima and Egyptian Giza. The everyday cotton that fills most retail shelves is Gossypium hirsutum, or upland cotton, which is medium-staple. Xinjiang grows both: large volumes of upland plus a smaller share of true long-staple and ELS. So the meaningful question is never just 'which country' but 'which species, what staple length, and combed or carded.'

Supima and Pima: American extra-long staple

Pima is American-grown barbadense long-staple cotton. Supima is a trademarked, source-verified subset: the name is a contraction of 'Superior Pima,' licensed by the U.S. grower association and traceable through a chain-of-custody program. Because Supima is certified end to end, it is the easiest premium cotton for a B2B buyer to authenticate. Pima that is not Supima-licensed can still be excellent, but you lose that built-in verification.

Egyptian Giza: the ELS benchmark, and the counterfeit risk

The finest Egyptian cottons, Giza 45, 87 and 88, are extra-long-staple with outstanding uniformity and fineness, which is why they command the highest prices. The catch is authenticity. 'Egyptian cotton' is a geographic term with weak enforcement, and independent DNA testing has repeatedly found that a large share of products labeled '100% Egyptian cotton' contain little or no genuine Egyptian fiber. High-profile U.S. retail recalls and lawsuits over mislabeled 'Egyptian cotton' linens pushed the industry toward DNA and genotyping verification.

Treat an unverified 'Egyptian cotton' label as a marketing claim, not a spec. Without a Cotton Egypt Association Gold Seal or DNA traceability, you cannot know what species or staple length you are actually buying.

Xinjiang cotton: high volume plus real long-staple

Xinjiang is one of the world's largest cotton regions, supplying the great majority of China's cotton and a meaningful share of global output. Most of it is upland cotton, but the region also grows genuine long-staple and some ELS barbadense, with long-staple fiber commonly in the 33 to 39 mm range, overlapping the lower end of ELS. For a wholesale buyer, that means Xinjiang can deliver long-staple bedding at competitive cost, provided you specify the staple class and grade rather than assuming 'Xinjiang' automatically means ELS.

Side-by-side: how they compare

How to verify what you are buying

1. 1.Ask for staple length in mm (UHM) and fiber strength in g/tex, not just a country name.
2. 2.Require 'combed long-staple' or 'combed ELS' on the spec sheet, not plain 'cotton.'
3. 3.For Supima, ask for the licensed trademark and chain-of-custody reference.
4. 4.For Egyptian, require a Cotton Egypt Association Gold Seal or DNA/genotyping test; otherwise treat the claim as unverified.
5. 5.Order a sealed lab-tested sample and, for large programs, third-party fiber testing on production lots.

How a B2B buyer should choose

Match fiber to program economics. For a certified luxury line where the story must hold up, spec Supima or DNA-verified Giza and pay for the verification. For high-volume retail or hospitality where you need genuine long-staple softness at a sharper price, verified long-staple Xinjiang or non-branded Pima is often the smarter buy. In every case, lock the staple class, combed yarn, thread count and finish into the spec so quality does not drift between lots.

Sourcing long-staple cotton bedding factory-direct

BeddingTextilePro supplies long-staple and combed-cotton bedding factory-direct from our Nantong, China source factory at a 100-set MOQ, with OEM/ODM customization and OEKO-TEX support, so wholesale buyers can lock verified fiber specs, TC and GSM into every lot.

Frequently asked questions

Is Supima better than Egyptian cotton?

Both are extra-long-staple barbadense cotton, so at top grades they feel similar. Supima's advantage is built-in verification: it is a trademarked, source-traced American Pima. Genuine Giza can equal or exceed it in fineness, but only if the Egyptian claim is DNA- or Gold-Seal-verified. Unverified 'Egyptian cotton' is the real risk.

Does Xinjiang cotton count as long-staple?

Partly. Xinjiang grows large volumes of medium-staple upland cotton plus a smaller share of genuine long-staple and some extra-long-staple, often in the 33 to 39 mm range. It can deliver true long-staple bedding at competitive cost, but you must specify the staple class and grade rather than assume all Xinjiang cotton is ELS.

Why are so many 'Egyptian cotton' sheets fake?

'Egyptian cotton' is a geographic label with weak enforcement, so it is easy to apply loosely. Independent DNA testing has found many products labeled '100% Egyptian cotton' contain little or no genuine Egyptian fiber, which triggered major retail recalls and lawsuits. Insist on a Cotton Egypt Association Gold Seal or DNA verification.

What should I put on a spec sheet instead of a country name?

Specify measurable fiber quality: staple length in mm (upper half mean length), whether it is long-staple or ELS, fiber strength in g/tex, and combed rather than carded yarn. Add thread count (TC), fabric weight (GSM), weave and finish, plus a verification requirement such as Supima licensing, DNA testing or OEKO-TEX.

Sources & references

1. 1.How to Think About Fiber Quality in Cotton — Alabama Cooperative Extension System
2. 2.Staple (textiles): USDA cotton staple length categories — Wikipedia
3. 3.Gossypium barbadense (Egyptian, Pima) and the ICAC ELS 35 mm definition — Wikipedia
4. 4.Xinjiang cotton industry: extra-long-staple production and share — Wikipedia
5. 5.Applied DNA Closes the Loop on Traceability for Egyptian & Pima Cotton — Textile World