These Walnut and Maple Coasters–Set of 4 are made with walnut maple hardwood. The coasters measure approximately 4″ x 4″ x 1/2″. The woods are laminated together to form the light maple stripe of the Walnut and Maple Coaster–Set of 4. After the glue up the coasters are cut to size and then sanded through the different grits of sand paper until the coasters are satin smooth. Then the coasters are given three coats of triple thick glaze top and bottom to protect them from use.