The T-Rex sensory chew necklace is a small, lightweight design, but is still a great option for the chewer who needs something a bit tougher. Chewer: Heavy Size: 60mm long, 45mm wide, 9mm thick The T-Rex is a great option for chewers who want something that can be chewed more heavily and firmly. Its chunky shape is firm but small enough to be easy to chew with the back teeth. It has been shown that this type of chewing can help calm and soothe anxiety, and help with concentration. We have paired this piece with a matching breakaway safety clasp and soft cord. The breakaway clasp improves safety by breaking open when a large force is applied to it. The cord offers a soft non-scratchy finish which will not irritate the wearer’s skin, but still be durable and tough.