Using these unfinished wood Christmas tree shapes is super easy. First, peel off the protective paper backing that's there to keep the wood safe during cutting and shipping. Then, you can start your DIY project. You can paint the tree, add decorations, or drill holes as you like. If you need a hole, just tell us the size and location. As for sizes, you have options from 3 feet up to 24 feet. The wood is cut from cabinet - grade Baltic birch plywood in 1/8 (3mm), 1/4 (6mm), or 1/2 (12mm) inch thicknesses. If you want a different thickness, just message us. When it comes to maintenance, keep the wood away from excessive moisture to prevent warping. If it gets dirty, you can gently wipe it with a dry cloth. That's all you need to know to enjoy these great DIY wood crafts!