Yellow Mountain Imports Magnetic Travel Go Game Set with Folding Board (13x13 Playing Field, 7.9 x 6.7 x 0.2 Inches) and Plastic Single Convex Stones Ultra-portable; board measures 7.9 x 6.7 x 0.2 inches (20 x 17 x .4 centimeters) when laid out flat for playing; when folded, it's half the size making it small enough to fit in your pocket; this set is for the hardcore Go enthusiast who is ready to play anytime, any place Magnetic; go stones magnetically attach to the board so you can play in the plane, train, or automobile; each stone measures approximately 0.04 x 0.39 inches (0.1 x 1.0 centimeters); set includes 91 black and 91 white plastic go stones 13X13 playing field; enjoy extreme portability and a 13x13 playing field for the quick, stimulating games that you can take anywhere; this smaller playing field enables you to play quicker, more frequent games so you can consistently improve your game when you do not have time for the full-length game 30-day return policy; 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 When Flat: 7.9 x 6.7 x 0.2 inches (20 x 17 x .4 inches) Stone: 0.04 x 0.39 inches (0.1 x 1.0 centimeters) Enjoy the 13x13 playing field for quick, stimulating games that you can take anywhere. Go stones magnetically attach to the board so you can play on the plane, train, or automobile. This set is small enough to fit in your pocket. Extremely portable. Thisis for the hardcore Go enthusiast who is ready to play anytime, any place.