Japan Blue Medium Weight Tartan Flannel Shorts (Forest Green)

Size Guide

When it comes to those in-between weather days, the flannels are the Go-To!

Slowly woven using vintage machines, this flannel fabric is thread dyed for better long-term fading. The colourways will gain a vintage, soulful looking and softer contrast. Perfectly modified for the ultimate cosy shorts experience; Thanks to being loosely woven, these are very breathable and have been left un-brushed for improved comfort.

With a rear wallet pocket and twin front slit pockets, these are still a practical choice for daily activities. To make for a more semi-casual look, the front side features double pleats. You can always adjust the fit with the hidden internal waist drawstring.

For a unique look this summer, go for these!

  • 100% Cotton
  • Japanese medium-weight tartan flannel
  • Yarn-dyed colourways
  • Pleated construction
  • Drawstring waistband
  • Once washed
  • Relaxed 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.