Size XS (CM) S (CM) M (CM) L (CM) XL (CM) XXL (CM) (A) Length 63 65 67 69 71 73 (B) Sleeve 66 68 71 73 76 78 (C) Chest girth 77 80 83 86 89 92 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!