These Custom SANTA BABY Patches can be applied to denim, 100% cotton, and polyester/cotton blends on light and dark colored garments. They can be applied to robes, hats, bags, t-shirts, sweatshirts and so much more! Size (Approx) : please see photo for exact, patch is approx 11x11 Backing: Iron On THESE PARTICULAR PATCHES CANNOT BE APPLIED TO ANY TYPE OF SURFACE THAT WOULD MELT WHEN HIGH HEAT IS APPLIED TO IT. The patches can be applied with an iron or a heat press. Iron Application Instructions: When applying the patches with an iron, set your iron to high heat. Using a fresh adhesive, lint-roll the surface of your garment where you will be applying your letter patches prior to prepressing to remove any lint. Pre-press your garment where letter patches will be applied for 10-20 seconds. Position patch on your garment, then cover them with a thin cloth or Teflon sheet. Press firmly straight down onto letter patches for 45 seconds in place. DO NOT MOVE IRON BACK AND FORTH. Turn your garment inside out and press firmly straight down for 30 seconds in place Let area cool for 60 seconds. If your letter patches do not fully adhere, then repeat