Our Drinkwear Swin Fin coasters slip on the foot of your stemware. Slip Drinkware onto the "foot" of your glass, it will travel with you as you mingle, and identify your glass with beach style! Set of 4 bright and stylish assorted Drinkwear Swim Fins includes a gift bag for hanging on the next of a wine bottle. Each coaster is approximately 4 1/2" long x 3 1/2" wide and are made of foam rubber.