The description says 100% cotton, tag reads 92% cotton 6% polyester 2% spandex. I own a lot of KanCan jeans in size 1/24 and they all fit the same with the exception of my black pair (run a tad bigger) The cotton percentage in my jeans is lower, 67%-73% I ordered my normal size and planned on cutting them to the length I prefer. The shorts run large, especially in the waist and thighs. The bottom button did not lay correctly, and it looked like it would come unbuttoned easily. I do like the style of these shorts, so I'm going to return them and purchase a size 0/23. For reference I'm 5'5 99lbs my body type is more straight than curvy.These are my favorite pair of shorts! Great fit!True to sizeLove them they fit perfect