This set of four mosaic coasters were made with clear, swirled and white colored glass gems on round white ceramic bases. White grout was added and then an epoxy resin for a shiny, smooth, easy to clean surface over the gems so your beverages or wine bottles will sit firmly in place. 

Each coaster measures 4" round.  The epoxy finish is fairly heat resistant, but to avoid any damage, these coasters would be better to hold a wine bottle or colder beverages or cans

Because the bottoms are slighly recessed, when not in use they stack nicely.