45to75

Helps designers and developers ensure that text line lengths (measure) meet their standards.

Each font and layout is unique, so it's up to the author to decide what measure works for their current situation, however a good "rule of thumb" is to keep the measure between 45 and 75 characters.

This will ensure your text stays readable across the various situations in which it could be read.

Highlight some text, right click, and view the character count right in the tooltip.