• Size: 40 x 40 cm, 50 x 50 holes. These large classic bases are available in different color combinations (green, gray, colorful) and offer ample building space for children to create, play, and display their creations. • Wide compatibility: The bases are compatible with all major brands of large building blocks that accept standard large particle building blocks. • Safe and eco-friendly material: Made with environmentally friendly ABS materials, odorless, ensuring a safe and healthy play experience for children. • Practical design: The bases allow for easy loosening and securing of building blocks, keeping them firmly connected even when turned upside down. • For builders of all ages: Ideal for building houses, planes, boats, or small animals, these building bases are sturdy and durable, perfect for both beginners and experienced builders.