Japan Blue

Japan Blue J404 12.5oz Africa cotton Circle Size Chart

Every published measurement for the Japan Blue J404 12.5oz Africa cotton Circle, size by size, widths flat and waist doubled, the numbers the tag size doesn't tell you.

CutRegular Straight
Maker's fit nameClassic Straight
Fabric12.5oz Africa cotton Circle
MillCollect Mills
Sizes28–38

In a size 32, the Japan Blue J404 12.5oz Africa cotton Circle measures 33.5″ waist, 12.25″ front rise, 13.25″ thigh and 8″ leg opening. Sizes on its chart run from ¼″ under the tag to 1¾″ over it, and each size up adds ⅞″. From knee to hem, the leg narrows 1½″.

Measurements in inches, widths flat and waist doubled
SizeWaistFront RiseBack RiseThighKneeLeg OpeningInseam
2829.251114.25128.57.2532.25
293011.514.512.58.757.532.25
3031.511.51512.7597.7532.25
3132.7511.7515.25139.257.7532.25
3233.512.2515.7513.259.5832.25
3334.512.516.2513.59.758.2532.25
343512.516.513.759.758.532.25
3636.5131714.2510.258.7532.25
3837.7513.517.751510.759.2532.25

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 2026-09-23. Always confirm with the retailer before buying — fits are re-cut seasonally.