Amber teething necklace is 100% pure genuine baltic amber. Ships with a certificate of authenticity for baby and toddler. 11" for newborn - 1 year. 12.5" for 5 months - 5 years. Must have for teething babies. Necklace is worn to reduce pain from teething, fever, and drool. 100% authentic baltic amber. Works in 30 minutes! Money back guarantee.