Iron Heart 18oz Selvage Denim Jacketed Shirt

Size Guide
With denim, simplicity comes with complication. This is a classic brought to a new level.

Usually only seen on denim jeans, this signature 18oz selvage denim fabric is the icon of Iron Heart. This slowly ageing denim will gradually gain a big contrast look with soft texture.

By using jacket style construction, this western denim shirt style can easily be worn over a tshirt or a hoody on any occasion. With dual hand warmer pockets and over-dyed black cotton twill linings in collar & cuffs, this is a durable piece you can enjoy everyday!
  • 100% Cotton
  • Japanese 18oz red selvage ID signature denim
  • Grand indigo dyed
  • Twin chest pockets
  • Large Logo copper snap buttons
  • Black cotton twill lined collar & cuffs 
  • Twin hidden side pockets
  • Chain-stitching Construction
  • Once washed (minimal shrinkage expected)
  • Slim fit
  • Made In Japan

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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.