Size XS (CM) S (CM) M (CM) L (CM) XL (CM) XXL (CM) (A) Length 63 65 67 69 71 73 (B) Sleeve 68 69 71 72 74 75 (C) Chest girth 90 94 98 102 106 110 The measurements are the measurements of the product. If your size normally is between two letter sizes (e.g. M and L) (adults), choose the smaller one. Still thinking what's the right size for you? Let us help!