Chewlery is a great way to keep kids from chewing on their clothes, while giving them the sensory input they need. It's also great for oral-motor stimulating activities. The non-toxic necklace is 6-1/4" - 16 cm in diameter and stretches. Chewlery is a great tool for children with Autism and other special needs who tend to chew on their clothes. Chewlery is a safe alternative that also looks less like a therapeutic item and more like a fashion statement.