Japan Blue

Japan Blue JMJA1300 12oz Wide Straight Jeans Medium Indigo Size Chart

Every published measurement for the Japan Blue JMJA1300 12oz Wide Straight Jeans Medium Indigo, size by size, widths flat and waist doubled, the numbers the tag size doesn't tell you.

CutRelaxed Wide
Maker's fit nameWide Straight
Fabric12oz Selvedge Denim
MillCollect Mills
Sizes28–38

In a size 34, the Japan Blue JMJA1300 12oz Wide Straight Jeans Medium Indigo measures 35.5″ waist, 12.5″ front rise, 13″ thigh and 9.25″ leg opening. Sizes on its chart run from ¼″ over the tag to 1¾″ over it. From knee to hem, the leg narrows ¾″.

Measurements in inches, widths flat and waist doubled
SizeWaistFront RiseBack RiseThighKneeLeg OpeningInseam
2829.2511.7515.2511.59.258.7531.5
3031.511.7515.2511.759.58.7531.5
3233.7512.2515.7512.59.75932
3435.512.516.2513109.2532
3636.2512.516.2513.510.259.532
3838.5131713.759.759.7532.25

Scroll the table sideways for the rest of the columns.

Listed under: Wide · Relaxed

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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.