The Ubuntu font has no monospaced version, so it's not suited for use in a terminal or console that has fixed width character cells.
In addition, console fonts are special bitmap fonts, not TrueType/OpenType fonts (but OTOH it shouldn't be too difficult to create a console font from a monospaced TrueType font).
Best Answer
Click through a bunch of questions in there, and one of the last ones will be about the console font size. per this post here: https://lists.ubuntu.com/archives/ubuntu-server/2010-June/004262.html