Maru Sankaku Peke by SDA 10oz "Morning Star" Chambray Workshirt

The sashiko star shines out for a better future!

This season we would like to introduce you to SDA's special project 'MARU SANKAKU PEKE' a.k.a OAX.

This one takes inspiration from those most beautiful examples of boro repairs on vintage Japanese work coats. The rear side features a skilful example of the vintage repairing process. The 'diamond-like', star-shaped patchwork pattern has been skilfully hand-cut and sewn using Japanese indigo-dyed fabric from vintage sashiko. Each pattern will be slightly different to the next resulting in a unique, one of a kind look.

The collar also features some tastefully applied, vintage fabric accents that add tasteful contrast.

Woven using vintage machines, the indigo chambray fabric is super smooth to the touch and features man shades of indigo thanks to the thread dyed fibres. OAX have also applied a realistic 'USED' process which results in a mottled indigo hue.

Constructed with chain stitched side gussets and classic, rounded symmetrical chest pockets, this is a durable yet tasteful choice for a semi-casual vibe. The polished nut buttons add a vintage charm and will develop more detail as they oxidise.

Enjoy the character and fade with time!

  • 100% Cotton
  • Japanese 10oz selvage chambray
  • Genuine indigo is yarn-dyed
  • Twin chest pockets
  • Urea buttons
  • "Morning Star" is made up of 100 years old vintage sashiko
  • The collar is patched with deadstock indigo hickory
  • Once washed (minimal shrinkage)
  • Slim fit
  • Made In Japan

Related Items

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.