How to make a French Seam?
A self-enclosed seam, a French seam is neat, narrow, and perfect for sheer fabrics where the seam allowances are visible, since it conceals all raw edges. However, it should be used only on straight fabric edges. This type of seam is machine stitched, and when finished should be no more than about 1/4in (6mm) in width. Place the fabric with the wrong sides together and raw edges even.
