I has the wild urge to make a very small character sheet for Swords & Wizardry. My main inspiration was the 0 level sheets from DCC. So roughly index card sized, four sheets per page, and as flexible as possible (Just put in whatever is right for the character under the “Notes” part). I also designed around may own personal tastes. I’m one of those weirdos who likes ascending AC so no little To-Hit Chart. May you find it useful.
Swords and WizardY Index Card Sheet