The shelf board has four rises to prevent small items from falling out. Shelf inner dimensions: W 20.5 x D 12.6 x H 0.4 inches (W 520 x D 320 x H 9 mm); Set contents: B mountain mat (recycled resin); Outer dimensions: W 21.7 x D 13.8 x H 26.4 inches (550 x 350 x 670 mm); Color: Ivory; Weight: 1.5 lbs (6.5 kg); Casters: Rubber car; Assembly required. Please be aware that we cannot deliver this product on Saturdays, Sundays and public holidays. ● Comes with direct manufacturer shipping, and payment will only be accepted. ●Please be aware that shipment to remote islands and Okinawa may be a separate estimation (delivery may not be available).