Iron Heart IH9634Z 21oz. Real Black Extra Heavy Denim Size Chart
Every published measurement for the Iron Heart IH9634Z 21oz. Real Black Extra Heavy Denim, size by size, widths flat and waist doubled, the numbers the tag size doesn't tell you.
In a size 33, the Iron Heart IH9634Z 21oz. Real Black Extra Heavy Denim measures 33″ waist, 11.5″ front rise, 11″ thigh and 8.75″ leg opening. Sizes on its chart run from ¼″ under the tag to ¼″ over it, and each size up adds 1″.
| Size | Waist | Front Rise | Back Rise | Thigh | Leg Opening | Inseam |
|---|---|---|---|---|---|---|
| 30 | 30.25 | 11 | 14.25 | 10.5 | 8 | 35 |
| 31 | 31 | 11.25 | 14.25 | 10.75 | 8.25 | 35 |
| 32 | 32.25 | 11.5 | 14.5 | 10.75 | 8.5 | 35 |
| 33 | 33 | 11.5 | 14.75 | 11 | 8.75 | 35 |
| 34 | 34.25 | 11.75 | 15 | 11.25 | 8.75 | 35 |
| 36 | 36.25 | 12.25 | 15.25 | 11.75 | 9.25 | 35 |
| 38 | 37.75 | 12.5 | 15.75 | 12.25 | 9.75 | 35 |
Scroll the table sideways for the rest of the columns.
Listed under: Straight · Regular
Find jeans that measure like the size 33 →
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Where to buy
- Hinoya (opens in new tab)$225Check availability
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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 2026-09-23. Always confirm with the retailer before buying — fits are re-cut seasonally.