Size S (CM) M (CM) L (CM) XL (CM) XXL (CM) XXXL (CM) (A) Length 69 71 73 75 77 79 (B) Sleeve 71 73 75 77 79 81 (C) Chest girth 86 90 94 98 102 106 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!