These 24 wooden panels are designed for use with our Rainbow Wooden Architect Shapes (Amazon # B07PGWJ1BD, # B07PDT5MQ6, # B07PJ181V4, # B07PFQYWPL). Use them to provide a foundation for building and stacking! These smooth panels are made from sustainable Beech wood and allow kids to stack and create structures with multiple levels. Children will love creating their own unique formations and building methods. For ages 12m+. || Sizes: Largest triangle: 12" x 6" x .1". Largest square: 6.1" x 6.1" x .1". Largest rectangle: 8.7" x 6.1" x .1". Largest arch: 6" x 3" x .1".