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freesewing/markdown/org/docs/sewing/seam-allowance/en.md
Joost De Cock b34a2ee2ed feat: Flat import of markdown repo 
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We've imported this without history because the repo contains our
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Since this contains many images, it would balloon the size of this repo
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title
Seam allowance

The inside of the leg on a pair of jeans. The SA is the dark narrow stretch of fabric next to the seam. It has been zig-zagged to keep it from fraying

Seam allowance, often shortened to SA, is the extra fabric at the seam that allows you to sew a garment together.

If, instead of sewing, you could magically join seams together, there would be no need for seam allowance.

Since we can't do magic, we need a bit of seam allowance so that the minor fraying of the fabric will not undo the seam.

Seam allowance can differ. 1cm is common for some patterns, but in the US 5/8" or 15mm is standard. Make sure to always check the pattern for the default SA.

Extra SA can be required for specific finished (like french seams) or for hemming.

Picture by Kristin Roach