Disney Necklace, Mickey Mouse fine jewelry collection new inbox

Necklace, Mickey Mouse, Disney, fine jewelry collection new inbox Chain is in little envelope original price $50. I would rather not open it up since it’s new to size the chain but I imagine it would be for a child and teenager. All the other Disney jewelry that I have states the chain was 16 inches plus a 2 inch extender but this one I guess because it’s a small box it doesn’t state it. I really don’t wanna have to open up the back.