Size: 8 Pcs 4x4in. The pattern and numbers are clear and easy to read. It has strong adhesion, which can firmly stick the rhinestones on the coaster and is not easy to fall off. Christmas Diamond Art Coasters: This DIY Diamond Art Painting Coaster kit includes 8 Diamond Art Painting Coasters, 8 adhesive non-slip cork bases, 1 Set of Colored Diamonds, 1 Coaster Holder, 1 Pen, 1 Clay, 1 Diamond Painting Tray, And give enough extra diamonds.