9
Custom Cork Coasters Bulk. Design your own custom coasters with your photos and text – a great gift idea. Sturdy hardboard photo coasters are 1.25" thick with non-slip cork backing. Big 4"x4" square custom photo coasters (rounded corners) for maximum coverage. Buy just one or up to 12 in a pack of photo coaster – get a different image on each coaster! High-resolution printing for great image quality.