Marlowe & Co's Silicone stacking rings are modern and timeless. The 7 piece stacking rings are thoughtfully designed with love and care. They feature classic neutral colors that are perfect for the modern family. Made from 100% food-grade silicone. They are BPA-free, phthalate-free, lead-free and CPSC-tested to ensure the highest quality and safety for your little one. These stacking rings can help develop fine motor and gross motor skills and are an excellent first educational toy. They can be used as a teether as the textures of the rings provide teething relief. Stacked they measure 5.5 inches tall.