Size S (CM) M (CM) L (CM) XL (CM) XXL (CM) XXXL (CM) (A) Length 65 67 69 71 73 75 (B) Sleeve 72 74 76 78 80 82 (C) Chest girth 100 104 108 112 116 120 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!