With this size home. I would go above 21 inches but no bigger than 26ish inches

This one is 27''. Would it work?

What I found in a lighting catalog: if you are using only one light beside the door, the fixture (overall height) should be 1/3 the height of the door. If you are using two fixtures beside the door, the overall height of each fixture should be 1/4 of the door height. The perspective from 50 feet away is what you want, not from right beside the fixture. The catalog recommended that if in doubt, go with a larger fixture.

i've been carefully noting exterior light fixtures since reading that and have found that larger (but not horribly oversized) fixtures DO look better. I think people don't take into consideration that most of the time light fixtures beside the door are seen from the street or sidewalk.

Thanks. I found my lights. I will post a picture once they r on.