The outline of a hat frame must be absolutely true in curve or angle. Always trim an edge carefully before wiring it. Try to train the eye to see curves in absolutely correct perspective. Brace wire is more commonly and widely used than any other one wire. Lace wire is used for wiring soft frames for sport hats, and for children's hats, and for lace bows and edges.
French wire is used for wiring frames and for edge wires.
Cable wire is used for frames only when a thick-edge effect is desired. In such cases it forms the only frame used. Cable wire and French wire may be used for the same purposes. The former simply makes a firmer hat. Lace wire is needed for wiring high lace ruffles and for lace or hair-braid edges and for lace flowers.