This is my key collection. It has several skeleton keys, 2 jewelry box keys, 1 locker key,1 key that I'm not sure about, and 1 key to city.
Here is the largest key compared to the smallest one. The largest is 7 1/2 inches while the smallest is just under 1 inch.
This one I'm not to sure about. If you know email me (my address is BobMackelson@gmail.com).
This is the largest key. I think it is a key to city or some other type of ceremonial key.
I got all these keys  at an antique store called antique avenue. I would recommend going there.

The store is located on 888 8th avenue in Marion, Iowa.