Using these unfinished wood Zia - shaped crafts is easy. First, peel off the protective paper backing. This backing is there to keep the wood safe during cutting and shipping. You can customize these crafts by adding a hole. Just tell us the size and location you want, and we'll take care of it for free. These crafts come in different sizes from 3' to 36' and are made of cabinet - grade Baltic birch plywood in 1/8 (3mm), 1/4 (6mm), or 1/2 (12mm) inch thickness. If you need a different thickness, reach out to us. To maintain these wood crafts, keep them in a dry place away from direct sunlight. When you're done with your project, you can use a simple wood cleaner to wipe them down and keep them looking great. Have fun with your DIY projects!