The Flat Head X CORLECTION 17oz D306MKC Natural Indigo Cotton/Silk Denim (Relax Tapered Fit)

Size Guide
In the name of Masayoki Kobayashi, founder of The Flat Head. You know, this pair of our denim collaboration with The Flat Head is some "Ultimate Luxury" ones for you to enjoy and collect!

This 17oz denim is specially developed by Kobayashi, founder of The Flat Head and created for the high-end The Flat Head/Japanese Denim hardcore fans! It is made up of 95% full-grain, long fibre cotton & 5% high-grade silk. The touch is much smoother if you compare it with The Flat Head's signature 14.5oz; The vertical texture is even much stronger due to its heavier weight!

Talking about the indigo-dyeing technique, the warp is grand indigo dyed 24 times like their signature 14.5oz denim then 11 times natural indigo dyed over the top! The colour looks even much darker than their 21oz denim and takes more time to age along, with wear and wash, you will see many bright shades of natural indigo coming up little by little and a higher contrasted look becomes later!

Construction-wise, The Flat Head asked their most skilful denim artisans in their studio to finish this collaboration denim. To make sure of a perfect stitching construction, each artisan can only finish 2 ~ 3 pairs of this collaboration denim per day from the beginning to the end, individually! We can proudly say, this pair of collaboration denim is heart-fully made by 'Old School Tailor Standard'!

Due to the limited run of this 17oz natural indigo cotton/silk denim, it is only 50 pairs made worldwide! If you are looking for some 'TOP OF THE TOP' Japanese denim, they are some ideal one!

  • 95% Long fibre, full-grain cotton & 5% high-grade silk
  • Japanese 17oz burgundy colour ID selvage cotton/silk denim (which is slowly woven from old machine)
  • Grand indigo is 24 times yarn-dyed then 11 times natural indigo dyed over the top
  • Vegetable-tanned goatskin leather patch
  • Iron buttons fly
  • Hidden copper rivets
  • Double-stitched front & back pockets
  • Mid-high Rise/ Slim Tapered fit
  • Made In Japan

This denim is some un-sanforized denim which has 3~5% shrinkage with wash:

Cold Soak: 0.5'' in the waist; 0.75'' in the inseam
Warm Soak/Cold Machine Wash: 0.75'' in the waist; 1'' in the inseam
Warm Machine Wash: 1.25'' in the waist; 1.5'' in the inseam

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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.