Flag of Ireland. Comes in several different designs and products. If you would like some product that I don't have yet please send me a message here or through my store MarianaEwa at Zazzle.
This round rubber coaster is made of a durable heat-resistant polyester fabric top, backed with a neoprene rubber non-slip backing, keeps things from sliding. It measures 3.5" in diameter, 1/8" thick. It will not discolor or fade, machine washable.