Shark Stencils use 10 mil Mylar which is high quality and flexible yet very durable. These Shark Stencils are reusable and great for so many different crafts or business uses. If you paint on the stencil we suggest cleaning off when done. If you need a different size that is not listed, just message us. We make them ourselves and can make any custom size. All sizing is based on the physical stencil not the text or image. We provide a border around the text or image to tape or clamp. If you have any questions we are here to help. Just send a message. Upon receipt of your order, please open and inspect right away. We know being in the gift niche that items are time sensitive. If there is an issue just message us within 14 days of receipt.