Children's Jewelry, Ages 3+. No BPA, no phthalates, no cadmium, no lead, no metals. 100% silicone (similar to pacifiers and nipples). Easily cleaned with dish soap and water, also dishwasher safe. Necklaces have a breakaway clasp for added safety. Jewelry can be used as a sensory tool. Children with fully developed teeth or excessive biting may be able to tear tags. Necklaces should be inspected before use. If damaged, discard immediately. If using as a sensory tool, please use under adult supervision. Necklaces are approximately 20" long.