Contemporary and classic! Featuring the Gordian Knot quilt block pattern, these square shaped coasters are engraved on bamboo wood. This set of coasters comes in a set of 4 and is equipped with felt pads as backing so that they don't scratch up your new coffee table. Square coasters measure 3-3/4" on each side. This would make a great gift for your geometry-loving friend or math teacher! Sets are packaged in white boxes with window hole for easy display. Due to the grain of the material, patterns and engravings vary.