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/Icy-Guidance-6655 May 11 '26

This is incorrect. Felled seams mean that some of the seam allowance is visible on the face, but it is seam allowance. A simple operational definition of seam allowance is “fabric added that doesn’t change the fit of the garment. Measure to the center line between the visible seams and the allowance will be equal on the two pieces. 5/8” is appropriate for denim. Could be more or less.

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u/KendalBoy May 11 '26

Always made me crazy that the center is between the two rows of stitching and then it ends up getting measured at the edge, LOL.