IMPORTANT. The sizing of Iron Heart tops (as with most Japanese brands) runs smaller than their Western equivalents (of S, M, L etc). Please do not assume that because you are normally an L, that you will be an L in these, you really should check the measurements below.

| Centimtres | S | M | L | XL | XXL | XXXL | | Length | 59.0 | 60.5 | 62.0 | 63.5 | 65.0 | 66.5 | | Shoulders | 44.0 | 46.0 | 48.0 | 50.0 | | 54.0 | | Chest | 98.0 | 104.0 | 108.0 | 114.0 | 118.0 | 122.0 | | Bottom | 91.0 | 96.0 | 100.0 | 104.0 | 108.0 | 112.0 | | Arm | 64.0 | 66.0 | 68.0 | 70.0 | 71.5 | 73.0 | | Cuff | 10.0 | 10.5 | 11.5 | 12.0 | 12.5 | 13.0 |
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| Inches | S | M | L | XL | XXL | XXXL | | Length | 23.0 | 23.6 | 24.2 | 24.8 | 25.4 | 25.9 | | Shoulders | 17.2 | 17.9 | 18.7 | 19.5 | 0.0 | 21.1 | | Chest | 38.2 | 40.6 | 42.1 | 44.5 | 46.0 | 47.6 | | Bottom | 35.5 | 37.4 | 39.0 | 40.6 | 42.1 | 43.7 | | Arm | 25.0 | 25.7 | 26.5 | 27.3 | 27.9 | 28.5 | | Cuff | 3.9 | 4.1 | 4.5 | 4.7 | 4.9 | 5.1 |
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