Short answer
Giza cotton is premium extra-long staple (ELS) cotton cultivated in the Nile River Valley of Egypt, known for its exceptional softness and strength, while Supima is trademarked American extra-long staple cotton grown exclusively in the USA.
Both represent the pinnacle of luxury cotton fibers used for high-end corporate shirting and premium boutique collections.
Tell us what you're looking for and we'll point you to the right market or supplier.