Purchased for my 7mo old. Fits perfectly as a Necklace and around the ankle for sleepin in. Has a screw tight clasp which is quite easy to close. She doesn't fuss with it on her at all so im not worried about her trying to eat it. Its lightweight so she doesn't even know it's there. She hasn't fully started teething yet so I can't attest to the pain relief yet but hopefully as she keeps wearing it we won't see much pain relief needed. Its beautiful and would highly recommend.