Although most of our Large Coast Guard Patches have an iron-on backing, we recommend that you sew them on for longer lasting results. Our Patches are made from colorfast threads on heavy backing to keep their shape and good looks. These Patches look great on the back of a jacket! Show your support for the Coast Guard with these Patches - Large. These Large Patches measure approximately 10 1/2 inches. Your satisfaction is guaranteed, period. Usually ships within 3 - 5 business days.