Technical flat drawn to scale from the size chart.
J301
Japan Blue's best-known cut: a regular top block that narrows steadily below the knee.
For a 32″ waist (our default: enter yours). Size 31’s waistband measures 31⅞″, ⅛″ under your waist: snug for the first few wears, then the waistband gives and settles right at your waist.
- Maker’s fit name
- Straight (tapered leg)
- Fabric
- 14.8oz US cotton "Circle" selvedge
- Weight
- 14.8 oz
- Maker
- Kojima, Okayama
- Shrinkage & finish
- Not stated by the source. Ask the seller whether the chart is raw or washed. Hemming and cuffing guide
Order size 31 for a 32″ waist, and check the seller’s own chart before you buy. Menjitsu may earn a commission when you buy through these links. It never changes your price or which jeans we chart.
Measured profile
at size 31- Rise
- mid
- Thigh
- regular
- Taper
- strong
- Opening
- narrow
| TAG | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 36 | 38 |
|---|---|---|---|---|---|---|---|---|---|
| Waist | 29⅛ | 30⅜ | 31⅛ | 31⅞ | 33⅛ | 34¼ | 35 | 37 | 39 |
| Front rise | 10 | 10¼ | 10⅜ | 10⅝ | 10⅞ | 11 | 11¼ | 11⅝ | 12 |
| Back rise | 15 | 15 | 15⅛ | 15⅜ | 15½ | 15¾ | 16 | 16¾ | 17⅛ |
| Thigh | 11 | 11⅜ | 11⅝ | 12 | 12⅜ | 12⅝ | 13 | 13⅝ | 14⅛ |
| Knee | 7⅞ | 8⅛ | 8¼ | 8½ | 8⅝ | 8⅞ | 9 | 9⅝ | 10¼ |
| Leg opening | 6¾ | 6¾ | 6⅞ | 6⅞ | 7⅛ | 7¼ | 7½ | 7⅞ | 8¼ |
| Inseam | 32¼ | 32¼ | 32¼ | 32¼ | 32¼ | 32¼ | 32¼ | 32¼ | 32¼ |
Inches; thigh, knee and opening are measured flat. Transcribed from Flâneurs (published in centimetres). Retailers measure differently; confirm with the seller before you buy.
Compare with another model
The Oni Denim 546 is longer in the leg (+3¼″), slimmer in the thigh (−¼″) and narrower at the knee (−¼″). Tapered vs Slim Straight.
How the 546 would fit
- Falls straighter below the knee, more of a column.
- Longer in the leg: more to cuff or stack.
| J301size 31 | 546size 30 | Diff. | |
|---|---|---|---|
| Waist | 31⅞ | 32 | +⅛″ |
| Front rise | 10⅝ | 10½ | −⅛″ |
| Back rise | 15⅜ | — | – |
| Thigh | 12 | 11¾ | −¼″ |
| Knee | 8½ | 8¼ | −¼″ |
| Leg opening | 6⅞ | 7 | +⅛″ |
| Inseam | 32¼ | 35½ | +3¼″ |
Diff. is the 546 minus the J301. Clear
Compare with jeans you own
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Cut close to the J301
The nearest matches by rise, thigh, knee and opening at size 31, from any maker.
SD-108
楽Relaxed Tapered- Rise
- 10⅜″
- Thigh
- 11¾″
- Knee
- 8½″
- Hem
- 7⅛″
XX-013
鋭Slim Tapered- Rise
- 10⅞″
- Thigh
- 12¼″
- Knee
- 8¼″
- Hem
- 7⅛″
546
細Slim Straight- Rise
- 10½″
- Thigh
- 11¾″
- Knee
- 8¼″
- Hem
- 7″
JB0601
楽Relaxed Tapered- Rise
- 10⅞″
- Thigh
- 11¾″
- Knee
- 8⅞″
- Hem
- 6⅞″