From upgrading home decor to promoting any business or brand, these blank coasters do it all. Available in both round and square shapes, each coaster features a classic corkwood underside and a glossy finish on the top for gorgeous looks. Get either the single pack or the four-pack to best match your needs. .: One size: 3.7" x 3.7" (9.5 x 9.5cm) .: Two shapes: round and rectangle.: Classic corkwood bottom