Using these unfinished wood bulb shapes is a breeze. First, peel off the protective paper backing that comes on most of the crafts. This was there to protect the wood during laser cutting and shipping. You can use these shapes for all sorts of Christmas DIY projects. If you need a hole in the shape, just send us a message with the size and location, and we'll add it for free. Regarding size, they range from 3' to 24', so pick the one that suits your project best. As for thickness, they're cut from 1/8 (3mm), 1/4 (6mm), or 1/2 (12mm) inch cabinet - grade Baltic birch plywood. If you need a different thickness, let us know. For maintenance, keep them in a dry place to prevent warping or damage. And if you have any questions while working on your project, don't hesitate to click the 'Message Seller' button, and we'll be happy to help you out.