Each patch is approx. 2 x 3 inches. Apply patch by  placing on any surface, cover it with a cloth (to avoid scorching patch) and preheat your iron, iron the patch about 140°C(285°F) for 30s, it will be quickly stuck because of its high temperature glue on the back, iron again on surface for 10-20 seconds to fix it. You can also sew it by machine or by hand for some heavy fabrics that can't be ironed. Great for jackets, shirts, pants, caps and beanies.