Iron Heart IH-666S-21 Size Chart
Every published measurement for the Iron Heart IH-666S-21, size by size, widths flat and waist doubled, the numbers the tag size doesn't tell you.
In a size 36, the Iron Heart IH-666S-21 measures 37″ waist, 11.25″ front rise, 12.5″ thigh and 8.5″ leg opening. Sizes on its chart run from even with the tag to 1½″ over it, and each size up adds 1″. From knee to hem, the leg narrows ¾″.
| Size | Waist | Front Rise | Back Rise | Thigh | Knee | Leg Opening | Inseam |
|---|---|---|---|---|---|---|---|
| 33 | 34 | 10.25 | 14.25 | 11.5 | 8.5 | 8 | 35.75 |
| 34 | 35 | 11 | 14.1 | 11.75 | 8.75 | 8.1 | 35.5 |
| 35 | 36.5 | 11 | 14.5 | 12 | 9 | 8.6 | 35.75 |
| 36 | 37 | 11.25 | 14.75 | 12.5 | 9.25 | 8.5 | 35.75 |
| 38 | 39.2 | 11.75 | 15 | 13 | 9.5 | 9 | 35.5 |
| 40 | 40 | 11.75 | 15.5 | 13.6 | 9.75 | 9.25 | 35.5 |
| 42 | 43 | 12 | 15.6 | 13.75 | 9.8 | 9.25 | 36 |
Scroll the table sideways for the rest of the columns.
Listed under: Straight · Slim · Biggest Waists
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Where to buy
- Withered Fig (opens in new tab)$385In 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 2026-09-22. Always confirm with the retailer before buying — fits are re-cut seasonally.