Iron Heart IH-666S-18 Size Chart
Every published measurement for the Iron Heart IH-666S-18, 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-666S-18 measures 34.5″ waist, 11″ front rise, 12.1″ thigh and 8″ leg opening. Sizes on its chart run from ½″ over the tag to 1½″ over it, and each size up adds 0.9″. From knee to hem, the leg narrows 0.8″.
| Size | Waist | Front Rise | Back Rise | Thigh | Knee | Leg Opening | Inseam |
|---|---|---|---|---|---|---|---|
| 30 | 31 | 10.3 | 14.25 | 10.8 | 8.1 | 7.25 | 35.5 |
| 31 | 32 | 10.6 | 14.25 | 11 | 8.25 | 7.3 | 35.25 |
| 32 | 33.2 | 10.6 | 14.6 | 11.6 | 8.5 | 7.75 | 35.5 |
| 33 | 34 | 10.8 | 14.75 | 11.8 | 8.6 | 8 | 35.25 |
| 34 | 34.5 | 11 | 15.1 | 12.1 | 8.8 | 8 | 35.5 |
| 35 | 36.5 | 11.3 | 15.25 | 12.5 | 9 | 8.3 | 36 |
| 36 | 37 | 11.5 | 15.3 | 12.75 | 9.1 | 8.5 | 35.5 |
| 38 | 39 | 11.75 | 15.75 | 13.1 | 9.6 | 8.8 | 35.5 |
Scroll the table sideways for the rest of the columns.
Find jeans that measure like the size 34 →
Jeans that fit like the Iron Heart IH-666S-18
- Iron Heart IH-666S-SBG
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- Iron Heart IH-666S-SLBod Iron Heart 16oz Slubby Selvedge Denim Slim Straight Cut Jeans Indigo Overdyed Black
- Okayama Denim OD+SDA "Matcha" Selvedge Jeans (Slim Straight)
- 3sixteen CS-100x Natural Dye Pack 14oz Brown (Blue Owl Exclusive)
All 10 closest fits, size by size →
Where to buy
- Iron Shop Provisions (opens in new tab)$385In stock
- 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.
More Iron Heart fits
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- 14oz Selvedge Denim Medium/High Rise Tapered Cut Jeans Indigo/Black IH-888S-142ib
- 14oz Selvedge Denim Straight Cut Jeans 634S Black/Black IH-634S-14bb
- 1955S-142 14oz Indigo Denim Jean
- 634s 21oz Indigo Selvedge Jean
- 832 10oz Denim Painter
- BSPIH25-301 19oz Denim (Self Edge x Iron Heart)
- BSPIH25-633 19oz Denim (Self Edge x Iron Heart)
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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.