These High Quality Cheer 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): varies, see photos 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.