Sigma Gamma Rho Greek Letters Chenille Patch - Iron On only Size: 11" X 4" LOVE this Chenille Patch Iron On! Great for all occasions and the patch is bold and beautiful! If you have any questions regarding the proper way to use an iron-on, please refer to the following instructions (YouTube has some great tutorials also) First things first, be sure to closely examine the fabric that you are applying the patch to. Polyester and silk are not good choices, as the heat from the icon can easily burn or discolor the fabric. If you are only applying one patch to the garment, choose an ideal area that catches the eye. For multiple patch placement, plan the layout before starting the application process. You don't want to run out of room, and you want to be sure to maximize your space. Place your item on a smooth, flat surface that is also heat-resistant. Iron the item first to remove the wrinkles and double-check to ensure the area is good for the patch.