Typography in Product Design

Typography in product design isn’t about choosing beautiful typefaces. It’s about building a system that scales across every surface, supports multiple languages, and remains readable at every density.

The Product Designer’s Typographic System

Scale, not sizes. Use a modular scale with defined ratios. I prefer 1.25 (major third) for dense interfaces and 1.333 (perfect fourth) for content-heavy pages.

Weights over families. A single well-chosen type family with 5-7 weights gives you more flexibility than switching between families. DM Sans, Inter, and SF Pro are workhorses for a reason.

Line length matters. 60-75 characters per line is the sweet spot for readability. In dense dashboards, you might go shorter, but never below 40.

Dark Mode Considerations

Text in dark mode isn’t just inverted white-on-black. Reduce contrast slightly to prevent eye strain. I use #E5E5E5 on #1A1A1A instead of pure white on pure black.

The best typography system is the one users never notice. When reading feels effortless, the system is working.