The smallest readable font, at 3x3 pixels (char size varies) [OC]
Directly created from the image in the Reddit, it'll be the best 3x3 font you'll ever see and use. Enjoy.
Small pixel font with 4px x-height.
X-height: 4px Ascent: 1px, 2px for some special chars Descent: 2px
As seen in Ready Set Goat! www.readysetgoat.com