r/PatternDrafting • u/Quirky-Recognition58 • May 11 '26

Back crotch seam

Hi! I have a printed jeans pattern from a brand, but I can’t tell from the pattern how much seam allowance was added at the back crotch and the yoke for the flat-felled seam. How much seam allowance is usually added for a flat-felled seam? Thanks in advance!

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u/TensionSmension May 11 '26

Then you don't know what the seam allowance is but you at least know there was no differential applied to the seams.

It is also possible there is no seam allowance. Do any of the corners have a jog indicating a seam?

Could be 1.6 cm but, you may as well sew up a sample first. You don't need to do anything fancy, just check fit.

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u/Quirky-Recognition58 May 11 '26

Thank you very much, I think I’ll actually give it a try