Leonardo Black & White Polka Dot Cascade Collection Set of 4 Cork Backed Coasters are 4.25"/10.5cm square  and have a classic yet contemporary black & white polka dot pattern with 2 coasters black with white dots & 2 white with black dots. The coasters are carefully made from durable easy clean laminate which has a heat resistant surface to 90 degrees Centigrade with a thick cork back and will grace any table. The coaster set comes in attractive see through acetate packaging making it an ideal gift