10 Slots, White. Gives you a simple way to organize and store your 12 inch by 18 inch construction paper. The container is a sturdy corrugated cardboard box that is made of recycled material and is recyclable. The 10 slots give you plenty of room to store all your colored construction paper, and keeps everything organized and easy to find. Each slot measures 3 inches in height, 12-1/4 inches in width and 18-1/4 inches in depth. The entire unit measures 16-7/8 inches high, 26-7/8 inches wide and 18-1/2 inches in depth.