chewing necklaces are made out of 100 food grade silicone and are a safe alternative for chewing Great for those with ADD ADHD Autism and or those with Sensory Processing Disorders as it may help with focus attention and sustained concentration Necklace measures 31 in in length Cord has a breakaway clasp for safety Appropriate for ages 4 years and up Please use under adult supervision Features . BPA Free 100 FDA approved Phthalate free food grade silicone. Soft on gums and emerging teeth Includes . 1 Chewing Necklace Specifications . Color Assorted Color. Certifications . Safety Choking Hazard Small Parts Not for children under 3 yrs. Allergens Contains No Allergens. Age Range 4 years. Material Silicone. Dimension 31 L x 3 1 4 W x 3 4 H in . Weight 5 5 lbs