Classical Coasters in bamboo A set of four coasters - one of each design. The patterns on these coasters are inspired by architectural ornamentation. Amber bamboo with linseed oil finish, 3.5" x 3.5" We use eco-friendly FSC certified bamboo plywood with a natural linseed oil finish. Our cutting boards and sushi boards are finished with food-safe butcher block oil. Please keep in mind that bamboo is a natural product and there is a range of variation in the color and shading of each sheet. The actual color may be slightly lighter or darker than shown in the photographs.