Compatible & Tight: Nice and thick and the engineering is precise - fitting with GM all brands of large-particle Lego toys bricks perfectly in minutes. As they are slightly thicker than Lego base plates so there is less flex so much better for moving around if you have a building or something built on it. Material: Eco-friendly ABS plastic, won't break or bend easily. These durable, flat construction base plates will remain firmly in place as your little builders get to work on their awesome creations Infinite Creativity: With base boards you can create your own dream town, manor, or even city. Let imagination run wild Specifications: 24*24 studs, 15 x 15 ( 38 x 38 cm), large enough to make big models and scenes, it's an ideal starter set whether you need fields, water or cityscape plates. Friendly Service: 30-days money-back guarantee for any reason, 180-days warranty for quality-related issues, friendly customer service.