TLDR Design · QUICK LINKS
HOW TO CHOOSE A UI FONT (AND 10 INTER ALTERNATIVES)
Summary from the TLDR Design newsletter
To choose an effective UI font, prioritize two key traits: cap-centered vertical metrics so labels optically center on buttons, align with icons, and allow a single padding token, and a tall x-height of 70–75% of the cap height so the full word appears evenly balanced when centered on capitals.