Millennia Zip-Up Long Sleeve Sports JacketFit Follow the size chart below (when in doubt, size up) Material Body: 78% Nylon, 22% Elastane, Gauze: 90% Nylon, 10% Elastane, Lining: 93% Polyester, 7% Elastane Details Compression fit, high quality ribbed workout material, collared with full front zipper, zipper pockets, thumb holes Brand Custom Label Model Pam is wearing a size 4 4: 00 0 (XS) 6: 2 4 (S) 8: 4 6 (S M) 10: 6 8 (M L) 12: 8 10 (L)