Using these unfinished wood graveyard shapes is easy. First, peel off the protective paper backing that's there to safeguard the wood during cutting and shipping. You can customize the shape by asking us to add a hole of your desired size and location for free. These shapes are great for all sorts of crafts. They come in different diameters from 1 foot to 36 feet and are made from cabinet - grade Baltic birch plywood in 1/8 (3mm), 1/4 (6mm), or 1/2 (12mm) thicknesses. When it comes to maintenance, keep them in a dry place to prevent warping. If you want to paint or stain them, make sure the wood is clean and dry. If you have any questions while using these products, don't hesitate to message us.