The Stem Gemz 2 Piece Wine Glass Coaster Set is a unique surface protector that easily slips onto the base of stemware. The bright colors make it easy for guests to easily identify their drinks. This colorful drink companion is made of soft rubber that helps keep the surface of your tables and counters free from water rings. There are 2 stem gemz per pack. Comes in assorted color pairings such as red/blue, pink/green, and red/blue. Each ring measures approximately 3.45" in diameter with a 1.75" diameter. These come packaged inside a window shelf box.