"Trench-style belts Fashion’s new soft fabric belts are reminiscent of those customarily found on trench coats. Suitable for mid-weight cottons, linens, wools, or microfibers, these belts are generally 1 3/8 inches wide (or wider) and may or may not have eyelets. When you sew: Simply cut two pieces of fabric, fuse lightweight interfacing to the wrong side of both, sew them right sides together, and turn them right-side out."
"Ribbon in solids, stripes, and prints make for fun, decorative belts. You can fold and sew one end of the belt around a buckle, or transform a tie belt by hemming the cut ends. Grosgrain and velvet ribbons have plenty of body, so they make beautiful belts. For finer satin or silk ribbons, layer two lengths of ribbon wrong sides together, with a strip of interfacing in between, then topstitch."
"You can use virtually any fabric or lightweight leather/suede. The key to a smooth, stiff custom belt is belt backing, which contains polypropylene; it can be purchased by the yard or on a roll, and can be machine-washed as well as dry-cleaned. Belt backing comes in 1-, 1 1/4-, 1 1/2-, 2-, and 3-inch widths, and can be cut down to size. Before you cover the backing with a very lightweight or stretchy fabric, stabilize the fabric with fusible lightweight interfacing."