This is a set of 4 Cadillac hubcaps which I believe are for a 1965 Cadillac.  Please see the pictures.  The measurement across is about 16 inches but I believe Caddy only had 15 inch wheels that year.  I am not sure of the exact fit so please see the pictures.  These are in normal used condition and I don't see any damage other than normal wear and tear.  You are buying these "as-is" with no returns, so please examine the pictures carefully before buying.