Iron Heart 888S 21oz Denim (Straight Tapered Fit)

Size Guide

If you want super strong contrast denim ageing you've got to try some heavy ounce denim! Some maybe scared of the weight and rigidity but this aint an issue with these 888S denims from Iron Heart!

As one of the most famous heavy weight denim brands, Iron Heart have created a brand another pair of denims for those who like hardcore, modern style ageing. Specially woven on vintage machines, the 21oz denim is grand indigo dyed and has gone through Iron Heart’s special softening process! Without effecting the ageing, this makes for a super soft and comfortable fit! This model comes in high rise, with a strong taper after the knee. Especially good for those who have large thighs.

For added durability and strength, the denims have been totally constructed with poly-cotton thread and include cotton twill back pocket linings! There is also an additional button in the fly to create a better mid-high rise fit.

Haven’t tried heavy ounce denims before or looking to experience hardcore ageing? This is great pair for you to start with!

  • 100% Cotton
  • Japanese 21oz red selvage ID Iron Heart new signature denim 
  • Grand indigo dyed
  • "Iron Heart" iron buttons
  • Hidden back rivets
  • Ultra thick cowhide leather patch
  • Selvage Fly construction
  • Cotton twills linings in back pockets
  • Poly/Cotton stitchings
  • Once washed (minimal shrinkage)
  • High rise/Straight Tapered 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.