Yellow Mountain Imports Etched Bamboo Go Table Board (Goban), 0.8 Inch Thick Bamboo board; this board is made of solid strips of bamboo, pressed together one layer at a time; not only is bamboo beautiful, but it is also durable and sustainable; wood grain may vary slightly from photos; the booklet, "The Way to Go", by Karl Baker is included to help the beginner learn the rules and strategy of this classic game Etched playing field; the lines are etched onto the board in the fashion of the ancient go boards; the grid size of this board is 23 x 25 millimeters (Chinese standard grid size), and the board measures 18.5 x 17.3 x 0.8 inches (47 x 44 x 2 centimeters) Reversible; 19x19 playing field on one side and 13x13 on the other; the 13x13 playing field keeps your skills sharp by allowing you to play shorter games when you don't have time for a full length one; you will appreciate the informality and convenience of the smaller playing field; use the 19x19 playing field when you have the time to fully immerse yourself into a standard game Stones sold separately; stones are not included; please see our other listings for go stones 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 Board: 18.5 x 17.3 x 0.8 inches (47 x 44 x 2 centimeters) This board is made of solid strips of bamboo, pressed together one layer at a time. Not only is bamboo beautiful, but it is also durable and sustainable. In addition to the19x19 playing field on one side of the Go board for the full-length games, this Go board also includes a13x13 playing field on the other for the shorter, more frequent games to keep your skills sharp. The lines are etched onto the board in the fashion of the ancient Go boards.