A t-shirt, a bath towel and a blouse each take approximately a half of a pound of cotton and a pair of jeans takes a pound and a half.

Source National Cotton Council of America

Fibers are classified according to use as textile, cordage, brush, felt, filling, and plaiting fibers. The primary textile fibers used for clothing and products are cotton, wool, rayon, nylon, flax, and silk.

Source Columbia Encyclopedia, Sixth Edition