My wife wanted a silver chain for Christmas.  I asked her what size.  As women often answer, "oh, 16 or 20 inch".
Well, should I get her a 16 inch or a 20 inch.  This nice little package gave me both and threw in a 30 inch and all for one reasonable price.  Since I am a Prime member, I was very pleased, (no shipping nor handling).  Chain very delicate and the box style lets the pendent glide easily.