Approximately 3.5" round (not including flippers & head) Can be bought as singles or sets. You can do all coasters the same or half this color and half that color in a set. If there's a specific color you'd like, please don't hesitate to ask! I may be able to help! Because each item is handmade, there'll be slight variations between each. There may also be color variation due to screen differences and brightness. All items made in a smoke-free home Spot clean only