Create a custom building surface on tables, walls, desks, playrooms, and more! These self-adhesive baseplates are compatible with all major brands of building bricks. Includes: 4 self-adhesive baseplates 2 Green baseplates 2 Blue baseplates Each baseplate measures 10" x 10" Covers approximately 20" x 20" when assembled Features: Peel-and-stick adhesive backing Can be cut to fit custom spaces Compatible with LEGO® and other major brick brands Great for playrooms, classrooms, STEM activities, and display walls Recommended for ages 4+ Factory sealed.