How to Sew a Flat Felled Seam

You may have never heard of a flat felled seam, but guaranteed you have worn one in the last few days. Found on almost all jeans and common in sport/athletic type garments and accessories. It adds strength and durability to a seam.

Here is a step by step tutorial on how to sew a flat felled seam. If you have any questions, just leave a comment!

Step 1

Right sides of fabric facing each other, sew at 1/2" seam allowance.

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Step 2

Trim one seam allowance down to 1/8".

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Step 3

Press untrimmed seam allowance over to have its raw edge just touch the sew line. It should be encasing the trimmed down (1/8") seam allowance.

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Step 4

Press all seam allowances facing one way from the right side of your fabric. Seam allowance should be pressed to hide any exposed raw edges. The back of your seam should look like the photo on the right.

Step 5

On the wrong side of the seam, edge stitch down the folded seam allowance.

Normal edge stitch is 1/16" away from folded edge.

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Completed Seam

Complete FRONT view.

Complete BACK view.

Happy Sewing!
Photographed and written by Sheila Wong Studios