X-height measures the distance from a typeface’s baseline to the top of lowercase letters such as x and o, including the bowl height in letters such as d, h, g, and y. section 20.3
When choosing type for small screens, look for:
- A medium-to-large x-height—roughly half the font size or more—because it usually supports large counters and apertures. section 20.3
- Similar x-height and legibility characteristics when pairing typefaces for headings and body text. section 20.3
Figure 20.2 When deciding on a typeface that will render well even on small displays, look for larger counters and apertures, good x-height, and low stroke contrast.
Compare x-height with counters, apertures, and stroke contrast when auditioning typefaces for small displays. section 20.3
