GREY Plastic Brick Building Base Plate, Large 15"x 15" Baseplate LEGO Compatible By Brand FUN FOR LIFE Lego-Compatible Brick Building Base 15'' x 15'' Grey Baseplate The baseplate is 50 dots x 50 dots Compatible with LEGO, Tyco, PixelBlocks, Mega Blocks Add another useful piece to your LEGO collection with this Baseplate