Children with developmental disabilities may have a tendency to bite due to their development and characteristics. Biting can provide a sense of security and relieve anxiety, but if they put things they shouldn't bite, such as clothing, in their mouths, stopping the behavior can lead to stress and tantrums. This item is for use in such situations! (Of course, adults can also use it.) It's a necklace, so you can wear it all the time. Having something "okay to bite" will allow parents and children to spend time together with peace of mind, even when they're out and about ◎ ●Size Length: 6 cm Width: 2 cm Thickness: 1 cm ●Color Blue, Light Green, Red, Yellow, Orange ※Important Notes ◎Since it is made overseas, there may be small scratches or stains compared to those made in Japan. ◎Although it is new and unused, it has been opened once for inspection. ◎The cheapest shipping method will be selected. If you have a preference, please comment before purchasing. Also, recycled packaging will be used. Thank you for your understanding and purchase!