A French seam encloses the raw edges, making additional finishing unnecessary. It looks flat like a plain seam from the front but appears like a tuck on the reverse.
Adapted from <a target="_blank" href="https://www.amazon.com/How-Adapt-Design-Sewing-Patterns/dp/1912217600/ref=sr_1_1?&_encoding=UTF8&tag=craftfocom-20&linkCode=ur2&linkId=f4b042f578db34cba298323a2e77e7a1&camp=1789&creative=9325">How to Use Adapt and Design Sewing Patterns</a> by Lee Hollahan and published by Barron's Educational Series. Lead image from flickr.com/craftytalk.
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<a target="_blank" href="https://www.craftfoxes.com/how_tos/sewing-a-french-hem-for-jeans-and-pants">See more info about sewing a French hem for jeans and pants!</a>
Step 1
Place the wrong sides of the fabric together, with the edges matching. Sew with a straight stitch 1/4in (6mm) from the edge.
Step 3
Fold the seam the opposite way, so that the right sides are now facing and the seam is pressed out to the edge.
Step 4
Complete the seam with a final row of stitching 1⁄4in (6mm) from the edge. This will enclose all the raw edges.