These High Quality 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) : 2.25 inches tall by 2.75 wide 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 should be applied with a professional heat press. Heat Press Application Instructions: When applying the patch with a heat press, set your temperature to 325 degrees Fahrenheit, the timer to 30 seconds, and the pressure to medium-firm. Using a fresh adhesive, lint-roll the surface of your garment where you will be applying your patch prior to prepressing to remove any lint.