Size S (CM) M (CM) L (CM) XL (CM) XXL (CM) XXXL (CM) (A) Length 73 74 76 77 79 80 (B) Sleeve 74 76 78 80 82 84 (C) Chest girth 87 90 93 96 99 102 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!