Using these unfinished wood butter knife shapes is easy! First, peel off the protective paper backing before you start your crafting. You can customize these shapes however you like. If you need a hole, just tell us the size and where you want it. These shapes come in various sizes from 3' to 36', so you can pick the one that fits your project best. They're made of cabinet - grade Baltic birch plywood in thicknesses of 1/8 (3mm), 1/4 (6mm), or 1/2 (12mm). When it comes to maintenance, keep them in a dry place to prevent warping. And if you're not using them right away, store them flat to maintain their shape. Have fun creating your kitchen crafts!