What are French Seams? French Seams are stitched first on the right side and then turned in and stitched on the wrong side so that the raw edges are enclosed in the seam. This has been the “old-fashioned” way of high-end garments – a sure sign of excellent quality, and an heirloom garment.
When the serger machine was introduced, it replaced this technique with threads wrapping around the raw edge. Although serged seams are universal, they aren’t as “pretty” as a French seam which eliminates the threads.