United Nations of New York Backgammon Set 18" Large 18" Backgammon Set. Size: 18" x 12" (closed) 18" x 24" (open). Uria stone backgammon checkers & dice. Each set complete with the Bello Games New York logo inside the dice compartment. *Note: While there are other map backgammon sets on the market this one is far superior as the interior has coordinating diamonds, backgammon checkers and playing fields, most others do not match.