Seven Mens High Elastic Casual Sexy Comfortable 3 Pack Colorful Boxers Underwear (M, Boxers Set-1) 95.3% Cotton,4.7% Spandex Importado Easy to wash. With cold water, hand wash or machine wash. The size is run small! Please check the measurement chart carefully before you buy the item. M=US S(fit for 5.5ft Height,Waist(27.16in~29.13in);L=US M(fit for 5.7ft Height,Waist(29.52in~31.88in); XL=US L(fit for 5.9ft Height,Waist(32.28in~35.03in);XXL=US XL(fit for 6.0ft Height,Waist(35.43in~38.18in); XXXL=US XXL(fit for 6.2ft Height,Waist(38.58in~40.94in);XXXXL=US XXXL(fit for 6.4ft Height,Waist(41.34in~43.63in). The size is a little smaller than US size. Please look at the size carefully. The size is fit for most USA People.PS:If you love our products or have other reviews,please write down on the item,it is very helpful for us,we will do better for you.