Yellow Mountain Imports Go Game Set with Bamboo 0.8 Inch Go Board with Double Convex Yunzi Stones and Bowls Solid bamboo go board; one 0.8" (20 millimeters) thick bamboo solid wood table board (goban); a felt go board is included Reversible board; Board is Chinese standard size (23 x 25 millimeter grids) and measures 18.5 x 17.3 x 0.8 inches (47 x 44 x 2 centimeters); playing field is reversible 19x19 and 13x13 Yunzi stones; 181 black and 180 white genuine Yunzi stones; 9.2 millimeters (size 33) double convex stones each measuring 9.2 millimeters tall and 21.5 millimeters wide (approximately 0.36 x 0.85 inches) Two bamboo bowls (gosu) that each measures 6.3 x 4.3 inches (16 x 11 centimeters); bowls fit stones up to 10.4 millimeters (size 37); includes vinyl stones and bowls carrier and securing bowl straps; booklet on how to play go, "The Way to Go", by Karl Baker is also included in the set 30 day return policy; here, at Yellow Mountain Imports, we want you to be satisfied with your purchase; you are backed by our 30 day no questions asked money back guarantee so you can buy with confidence