DreambuilderToy Building Baseplate (50 x 50 studs), 15.75"Lx 15.75"W, Dark Bluish Gray, X-Large Great deal- one dark gray 50x50 baseplate, 15.8"x15.8" or 40cm x 40 cm Fun to play--perfect for building playing table, will hold your construction tight even when you put it upside down Stronger and more durable-- much durable than all other brand 15x15 base plate, guaranteed no bend, no wrap, no bow Compatible with all major brand: You can mixed play with all major brand bricks, an affordable way to increase building options More products from our store: We also sell base plates and building bricks at various size and color