Iron Heart IH-633S 21oz Size Chart
Every published measurement for the Iron Heart IH-633S 21oz, size by size, widths flat and waist doubled, the numbers the tag size doesn't tell you.
In a size 34, the Iron Heart IH-633S 21oz measures 33.5″ waist, 11″ front rise, 12.25″ thigh and 8″ leg opening. Sizes on its chart run from ½″ under the tag to even with it, and each size up adds 1″. From knee to hem, the leg narrows 1″.
| Size | Waist | Front Rise | Back Rise | Thigh | Knee | Leg Opening | Inseam |
|---|---|---|---|---|---|---|---|
| 29 | 28.5 | 10 | 14 | 11 | 8.25 | 7 | 35.75 |
| 30 | 29.5 | 10.25 | 14.25 | 11.25 | 8.25 | 7 | 35.75 |
| 31 | 30.5 | 10.25 | 14.5 | 11.5 | 8.5 | 7.25 | 36 |
| 32 | 32 | 10.75 | 14.75 | 11.75 | 8.75 | 7.5 | 36 |
| 33 | 32.5 | 11 | 15 | 12.25 | 9 | 7.75 | 35.5 |
| 34 | 33.5 | 11 | 15 | 12.25 | 9 | 8 | 35.5 |
| 36 | 35.5 | 11.25 | 15.5 | 13 | 9.5 | 8.25 | 35.5 |
| 38 | 37.5 | 11.75 | 16 | 13.8 | 10 | 8.5 | 35.5 |
| 40 | 39.5 | 12.5 | 16.5 | 14.25 | 10.25 | 9 | 36.5 |
| 42 | 41.5 | 12.5 | 16.5 | 14.5 | 10.25 | 9 | 36 |
Scroll the table sideways for the rest of the columns.
Listed under: Tapered · Regular · Biggest Waists
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Where to buy
- Self Edge (opens in new tab)$370In stock
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About Iron Heart
Established in 2002 by Shinichi Haraki, Iron Heart began as a clothing brand for Japan’s motorcycling community, drawing on Haraki’s two decades in the Japanese garment industry, where he started as a pattern maker. Its company, Works Inc, is based in Japan with offices in Shibuya and Hachioji, and works mostly with small, family-run mills and workshops. The brand is known for heavyweight denim and durable fabrics, including Japanese-made jeans in cloth as heavy as 21oz and beyond.
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Source: retailer size chart (opens in new tab). Last verified 2026-07-12. Always confirm with the retailer before buying — fits are re-cut seasonally.