Define the word space to suit the size and natural letterfit of the font.
Robert Bringhurst
Don’t Make It Hard
Users Are Your Friends
Determining the proper character length depends on multiple variables including typeface, number of columns, font-size, and weight. You usually want your character length to be between 45–75 characters per line.
Finding Line Length
It only matters for the body copy
Not enough characters per line
Balance Is Important
Too many words is tiring
Lorem ipsum, dolor sit amet consectetur adipisicing elit. Excepturi eos officia ipsa laudantium eaque, illo doloremque tempora nesciunt tempore molestiae odio magni dolorum sint in qui. Corporis dicta commodi asperiores.