1. The seam allowance usually requires some sort of seam finish to prevent raveling. 2. The 5 / 8-inch seam allowance will create the space between the spirals. 3. The seam is first sewn with wrong sides together, then the seam allowances are trimmed and pressed. 4. Plain seams may also be pressed open, with each seam allowance separately secured with an overlock stitch. 5. Flatlock stitching creates a seam where the seam allowances lies flat to the garment instead of hanging loose from it. 6. Check to see that seams are securely stitched, with at least a half-inch seam allowance so stitches won't easily pull apart. 7. On mass-produced clothing, the seam allowances of plain seams are usually trimmed and stitched together with an overlock stitch using a serger. 8. It joins two pieces of fabric together face-to-face by sewing through both pieces, leaving a seam allowance with raw edges inside the work. 9. Check to see that seams are securely stitched, with at least a 1 / 2-inch seam allowance so stitches won't easily pull apart. 10. The bias strip is placed on top of the seam allowance , right sides together, and stitched 1 / 8 " from raw edges.