4" Eastland Square Glass Coaster. Great Wedding Favor, Protects and Complements Table Arrangements. Elegant Clear Glass Contemporary Square Design Easily Personalized. (Set of 4) 4" Eastland Square Glass Coaster (Set of 4) Contemporary Square Glass Coaster is 4" x 4" with 1/8" thick glass and anti-skid feet. Clear glass coasters have nonporous surfaces that are easily cleaned and maintained. Complements and protects table arrangements. Serves as a candle holder or glass holder Coasters are great as inexpensive wedding favors or economical gifts. Smooth surface can be easily personalized with a marker or by etching.