# Font size

Sets how big the text is.

## What does `font-size` do?

`font-size` sets how big the text is.

```css
.fine-print { font-size: 12px; }
h1 { font-size: 2.5rem; }
```

Level: Novice · [More CSS terms at this level](https://www.ask-codey.com/glossary/subjects/css/novice)

Updated: September 27, 2026

Source: https://www.ask-codey.com/glossary/font-size