Japan Blue J427 17oz Classic Straight Jeans Size Chart
Every published measurement for the Japan Blue J427 17oz Classic Straight Jeans, size by size, widths flat and waist doubled, the numbers the tag size doesn't tell you.
In a size 33, the Japan Blue J427 17oz Classic Straight Jeans measures 34.75″ waist, 11.75″ front rise, 13.5″ thigh and 8.75″ leg opening. Sizes on its chart run from 1″ over the tag to 1¾″ 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 |
|---|---|---|---|---|---|---|---|
| 30 | 31 | 11 | 14.5 | 12.25 | 8.75 | 7.75 | 34.75 |
| 31 | 32 | 11 | 15 | 12.5 | 8.75 | 7.75 | 34.75 |
| 32 | 33.75 | 11.5 | 15.25 | 13 | 9 | 8.25 | 34.75 |
| 33 | 34.75 | 11.75 | 15.25 | 13.5 | 9.5 | 8.75 | 34.75 |
| 34 | 35.5 | 11.75 | 15.75 | 13.5 | 9.5 | 8.75 | 34.75 |
| 36 | 37.5 | 12.25 | 16.25 | 14.25 | 10 | 9 | 34.75 |
| 38 | 39 | 12.5 | 16.5 | 14.5 | 10.25 | 9.25 | 34.75 |
Scroll the table sideways for the rest of the columns.
Listed under: Straight · Regular
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About Japan Blue
Established in 2010 by the COLLECT mill in Kojima, Okayama, Japan Blue Jeans began as an in-house project of the Japan Blue Group, with Hiroki Kishimoto credited as its founder. The brand builds on the group’s own fabric development, holding that making jeans is making fabric, and its garments are cut, sewn, and finished in Kojima. Its selvedge denim is woven on vintage shuttle looms, often with rope dyeing and slub textures. The label launched with a single 14.8 oz. U.S. cotton selvedge fabric and now spans a wide range of weights and weaves.
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Source: retailer size chart (opens in new tab). Last verified 2026-09-01. Always confirm with the retailer before buying — fits are re-cut seasonally.