Using your unfinished wood mason jar shape is super easy. First, peel off the protective paper backing that's on most of these crafts. This backing is there to protect the wood during laser cutting and shipping. You can customize it however you like. If you need a hole in it, just tell us the size and where you want it, and we'll add it for free. These shapes come in sizes from 3' to 36', so pick the one that fits your project. They're made from cabinet - grade Baltic birch plywood in 1/8 (3mm), 1/4 (6mm), or 1/2 (12mm) inch thicknesses. If you need a different thickness, just send us a message. To maintain your wood craft, keep it away from excessive moisture. You can sand it more if you want a smoother finish, or paint it with wood - friendly paints. Have fun with your DIY project!