Can be linked vertically or horizontally. *2 or more of this product is required for connection. When stacking, please use up to the second level. Each piece is set on the back wall. Figure compatible size (external dimensions): when united: approx. W 3.3 x D 1.8 x H 6.7 inches (W 84 x D 46 x H 170 mm); when connected horizontally (2 pieces): approx. W 3.3 x D 1.8 x H 13.4 inches (84 x 46 x 340 mm); Product size: approx. 185 x 185 mm) (185 mm) (185 mm) (10 mm) (10 x 185 mm) (assembled external dimensions when assembled) Material: Polystyrene, Made in Japan.