Set of 4 fused glass coasters in Blue iridized glass with a border of white art glass. Iridized glass captures a rainbow of color. The way light plays off the glass changes the colors you will see. Perfect for house warming gifts or holiday gift. 3.5" square. Food safe Rubber bumpers are on the bottom corner of the dish for stability on your table. Hand wash only. Food safe. The coaster holder is sold separately. If you would like the holder please send me a message and I will create a custom listing for you. Each piece is personally handmade by me in my New York studio using several layers of art and/or dichroic glass. These layers are cut, fused together, shaped, and fused again to achieve a unique and in most cases a one of a kind design. Each piece is examined to insure the very best for you. All fused glass has been properly annealed for strength and durability.