These are RTS, if you buy with an item that is preorder then it will ship with that item.

Gold necklaces: Adjustable and range from 8in-13in long 

Black Letter Necklaces: 10in long snap closure

You should never leave a child unattended wearing these items and it is not safe to allow your child to sleep in these items. Always take the items off before strapping children into any seats, strollers or other equipment. The child should not chew on or put these items in their mouths.