Boncoura 15oz Denim US Navy Hat (Indigo)

Size Guide
Inspired from 1940s US Navy hat (as known as 'Seaman Hat'), BONCOURA does make it to another level!

It is constructed with BONCOURA’s signature 15oz indigo denim. The texture of the 15oz denim is smooth but quite uneven, the shade of indigo itself is so dark thanks to their unique, completely pure indigo dye.

If you are looking for a perfect denim hat to age along with, these are some ideal ones!

  • 100% Cotton
  • Japanese 15oz light purple selvage ID smooth & uneven textured denim
  • Pure indigo dyed
  • 4 Panels Construction
  • Made In Japan
  • Size: M(59cm); L(61cm); XL(63cm)

NOTES: The garment will shrink 1 ~ 2cm smaller with washes and stretch if it fits snug.

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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.