Japan Blue 12.5oz J304 'Circle' Denim (Straight Tapered Fit)

Size Guide
Here's the JB classic, now with an improved fit!

Those who are after a solid pair of Japanese denims with a great price, these are for you!

Made using vintage machines, this 12.5oz denim has been woven with African, long fibre cotton which makes up for a soft textured feeling. By blending white and brown cotton fibres, JB have created a vintage inspired brown white coloured weft.

These come with a newly developed curved waist section for a better fit around your body!

With time, expect to see some amazing fades with soft contrast and a subtle vintage brownish hue. The full grain cowhide patch will also gain a unique, dark tan patina.

For your comfort, JB have made these with brass zips and a once washed fabric!

  • 100% Brownish African cotton
  • 12.5oz Japanese red ID selvage denim
  • Copper zipper fly
  • Heavy canvas inner pockets
  • Turquoise inseam stitching
  • Once washed (minimal shrinkage)
  • Mid-high rise/Straight Tapered fit
  • Made In Japan

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How We Measure

Pants and Shorts


With the major buttoned up (i.e. the top button) open the jeans and lay them flat, like shown. Measure from the front where the major button closes to the back belt loop. Double this measurement to find the waist measurement.

The way we measure the waist is different from the 'Side to Side' technique. If you are used to the 'side to side' technique you can roughly roughly downsize by 1 inch.

For example, 'side to side' measurement for The Flat Head 3002 waist is 28inch and using our method measures at 29.25inch.

Front Rise:

With the jeans lying flat measure from the crotch bar tack to the top of the waistband. 

Back Rise:

Spread out the crotch so the bar tack is visible, then measure from the crotch to the top of the waistband.


One inch down from the crotch, measure flat across to the other side.


Flatten the leg and measure along the inseam from the crotch to the leg hem. 

Leg Openning:

Measure straight across the hem from side to side.





Lay flat then measure from the shoulder's edge to the other shoulder's edge.


Lay shirt flat and measure from pit to pit.

Sleeve length:

With the sleeve flat measure from the shoulder to the cuff.

Arm hole openning:

Measure from the shoulder down to the pitt.

Vertical length:

With the shirt facing down, Measure from below the collar to the bottom hem.