Japan Blue Indigo Sashiko Field Hat

Size Guide
Let that indigo shine out with time!

Inspired by vintage field hats, JB blended this practical design with the traditional Japanese sashiko fabric. We do like this combination of modern design and tradition.

The outer shell is made of a vintage machine woven medium weight sashiko fabric. The threads have been grand indigo-dyed to reveal beautiful high contrast fading with time. The lower surfaces of the fabric will retain their dark hue whilst the raised surfaces will brighten and shine!

With a re-inforced cotton twill sweatband and lining, it'll fit comfortably on your head no matter the season.

For a tasteful Japanese style with vintage practicality, this is the choice!

  • 100% Cotton
  • Shell: Japanese medium weight grand indigo dyed sashiko
  • Lining: Japanese lightweight cotton twill
  • Six Panels Construction
  • Once washed (minimal shrinkage)
  • Made In Japan
  • Size: Free (56cm ~ 58cm)

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How We Measure

Pants and Shorts


With the major buttoned up open the jeans and lay them flat like shown. Measure from the front where the major button closes to the back belt loop. Then double this measurement to achieve the waist measurement.

The way we measure is different from 'Side to Side', If you are not used to our method you should downsize by 1 inch.

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

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.