Size of 1 piece: Width 25.0 x Depth 25.0 x Thickness 0.4 inches (63.5 x 63.5 x 1 cm); Material: EVA resin (ethylene, vinyl acetate); Set Contents: 16 joint mats, side parts (16 corner parts, 16 pieces) The color tone of the photo may differ from the actual product depending on your monitor model and settings.Made in China (supervised by Japanese Corporation)