This is a necklace with an autism awareness charm on it. The charm is approximately 3/4" tall and the necklace is 16 inches. There is also an 18 inch necklace available. Paired with the necklace are hoop earrings. The ASD earrings hang down about 1 1/2 inches. Hoop comes down about 1/2 inch. These are wonderful pieces of jewelry that can be used to show your autism ASD awareness.