Children will enhance their sensory and observation skills while building their fine motor skills. Encourage open-ended play and nurture creativity and early problem solving skills. Made of smooth Beechwood. Small Rings Set of 10 (1.9" Dia.). Medium Rings Set of 10 (2.20" Dia.). Ages 10 months and up.Small and Medium Rings Set goes with the ring stand base (Product number:C73911). The Ring stand base (Product number:C73911) is sold seperately.