Scs Direct Brick Building Blocks Large Green 10'X10' Baseplates(4Pcs) Connects On Both Sides - Compatible And Tight Fit With All Major Building Blocks Brands - Great For Activity Tables, Kids GiftBrick Building Extra Large Base Plates (4 Pack) 10'x10' Green Stackable Baseplates for Toy Bricks & Blocks Compatible w All Major Brands Dual Side Connectivity: The best way to expand your building, this unique 4 pack of extra large building base plates gives you the freedom to create as you wish. Each set is custom designed to be tight fitting with all major brands. Underside Connectability so you can connect bricks from top or bottom.