Building Brick Block Base Plates - Cream White 10 Pack of 5" x 5" Baseplates - Compatible Major Brands 10 packs 5 x 5 inch (16 X 16 studs) white baseplates ,ABS material Compatible with Major Brands, Not for DUPLO sized blocks Keeps your creations together ,easy to carry and tight fit.Great for group building. Recommended for age 3 and up. The plates are not affiliated with or endorsed in any way by Lego, a registered trademark of Lego Systems