Be sure that your metal handle fasteners do not show. Sew around the metal hoops of the handle fastener. Use a buttonhole stitch for the best results.
When you sew the handles on, be sure you are using a thread that matches the outside of the placemat. If your placemat is lined, sew only through the inner layer so that no stitching shows on the outside of the bag.
After the handles are secure, your bag is finished. Try some of these tips to make your bag truly unique.