Set of 4, each coaster has a 3.5" x 3.5" cork backing. Each coaster is 4.25" x 4.25". The image is transferred to ceramic tile and distressed by hand. Each one is unique, and no 2 are alike. By purchasing, you are acknowledging that these coasters are individually made by hand and in no way will have 2 alike. They are intended to have that rustic/distressed look. These are not dishwasher safe and should be wiped clean with a damp cloth.