Using these unfinished wood mermaid siren silhouettes for your DIY crafts is super easy. First, peel off the protective paper backing that comes on most of the crafts. This was there to keep the wood safe during cutting and shipping. If you need a hole in the shape, just let the seller know the size and where you want it, and they'll add it for free. You can choose from sizes ranging from 3' to 36' and different thicknesses of 1/8 (3mm), 1/4 (6mm), or 1/2 (12mm) inch cabinet - grade Baltic birch plywood. If you want a different thickness, just send a message. These products are hand - made in the suburbs of Pittsburgh, so you know they're made with care. When it comes to maintenance, keep the wood away from excessive moisture to prevent warping. If you're painting or staining the wood, make sure to do it in a well - ventilated area. And if you have any questions at all, don't hesitate to click the 'Message Seller' button.