Samurai 12oz Heavyweight Flannel Early Workshirt (Pineapple)

Size Guide

Looking to stock up on some serious flannels for the colder months ahead? Samurai has the answer!

This specially developed 12oz flannel has been slowly woven with vintage machines to create a comfortable yet highly durable fabric!
The outer surface & interior have been double-brushed, to create a soft, cashmere-like texture!

With a combination of chain-stitch and single-needle construction, lined plackets, extra elbow panels and a triple-stitched yoke, Samurai has engineered next-level durability into their garments!

The flannel features an asymmetrical pocket design, characteristic of 1920s early workshirt styles. Samurai has updated the classic pattern to create a more modern elegant fit!

If you are looking for some of the best in premium Japanese flannels, you can't ignore Samurai!

  • 100% Cotton
  • Japanese 12oz heavyweight flannel (specially developed by Samurai)
  • Colours are thread-dyed
  • Brushed shell & interior (soft like some finest cashmere)
  • Urea buttons
  • Japanese lightweight cotton twill lined collar & cuffs
  • Once washed (minimal shrinkage)
  • Chain-stitching Construction
  • Slim fit (Oversea Edition)
  • 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.