While it’s common to simply increase the point size to make text easier to read, Mr Stobberup says that readability is actually determined by x-height.

The x-height is the height of most lowercase letters in the Latin alphabet, and makes up nearly all of the printed marks on a page.

The x-height can be increased without enlarging all of the text.

For many designers, increasing the x-height is key to increasing legibility .

This has a larger x-height than, for instance, the popular typeface Garamond.