This rubber coaster is made of a durable heat-resistant polyester fabric top, backed with a neoprene rubber non-slip backing, keeps things from sliding. Square 3.5" x 3.5"; round is 3.5" diameter. The rubber coaster is 1/8" thick. It will not discolor or fade, machine washable.
Shipping for me was 43.60,which works out to only a buck apiece