Scs Direct Brick Building Base Plates - Large 10'X10' Blue Baseplates (Set Of 4) - Dual Connectivity On Both Top & Bottom Sides, Tight Fit W All Brands, Great For Kids Play Table, Gift4 Large 10 inch by 10 inch base plates with brick connectivity on top and bottom for multi level building. The best way to expand your building. This unique 10 pack of building baseplates gives you the freedom to create as you wish . Create a river, lake or ocean scene with this vibrant blue set. Each one is custom designed to be tight fitting with all major sets.