Large building blocks of two different sizes. The interior reinforcement allows the child to climb onto their finished construction. For creative play both indoor and outdoor. Dishwasher safe. Large blocks measure 30cm W x 15cm D x 16cm H (12"x 6"x 6.25"). Small blocks measure 15cm W x 15cm D x 8.25cm H (6"x 6"x 3.25”). 26 pieces. Ages 2+.