High Quality Made from the safe, durable plastic, as the more sturdy than other classic base plates, our baseplate have a more long lifetime. Size and Application Measures 10" (25cm) x 10" (25cm), Classic standard size, compatible with all major building block brands that accept standard building blocks for small particles. Durable and Humanization Design Good toughness, durable, not easy to break and deform, Compact and not easy to fall. More number of plates format allows child to build and expand on the world he or she has created. More Playability and Fun : The possibilities are limitless with these Classic Building Plates. Children will build, play, and display all of their favorite creations with these accessory.