Both points I have pondered. I'm no so much worried about standard house keys as they are not so large. But for some reason it appears that car manufacturers design they keys as yet another billboard for the brand. Making the key fit the emblem rather than vice versa.

For example the coated area on my 02 for ranger key is 1.125" X 1.675" and then the key starts from there.
The one for the Liberty is 1.25" x 1.5" and also comes with the Handy dandy 1.25" X 2.75" Key fob. <img src="/images/graemlins/mad.gif" alt="" />

It just seems that they could be maybe 3/4" either way plus a key.
Am I missing something here other than blantant commercialism that everyone has come to accept.