Find the 12 Packs: 4 ct. (48 total) 3.875" Birchwood Slices by Make Market® at Michaels. With natural bark edges and an unfinished surface, these birchwood slices are a fun way to add personal style to your décor. Great for making coasters or used as part of a larger craft project, finish these pieces with your own unique touch by adding cheerful patterns in paint, stain, glitter, decoupage and more.