These High Quality Cowboy Hat 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) : 3.25" X 2.25" 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.