95% Polyester, 5% Spandex Casual Solid Regular Crop Short Sleeve Collared Machine Wash Cold with Like Colors Measurement (in inches) International Size----------Chest Girth----------Shoulder Width XS------------------------------31 1/8--------------------------14 1/8 S--------------------------------32 5/8--------------------------14 5/8 M-------------------------------34 1/4-----------------------------15 L--------------------------------36 5/8--------------------------15 5/8 XL------------------------------39 -----------------------------16 1/4