Prev Next

CSS Font Size

Font size defines how large or small your text appears. You can specify sizes in pixels, ems, rems, or percentages. Choosing the right font size improves readability, usability, and overall user satisfaction.

Key Topics

Unit Choices

Pixels provide fixed sizes, while em and rem scale based on parent or root font size. Percentages adapt to parent sizing, aiding responsiveness.

Responsive Sizing

Using em, rem, or percentages makes text scale well on different devices, ensuring a comfortable reading experience.

<style>
    body {
        font-size: 16px; /* base size */
    }
    h1 {
        font-size: 2em; /* 2 times the body font size, scales if base changes */
    }
    p {
        font-size: 1rem; /* relative to root size, consistent scaling */
    }
</style>

Explanation: Using relative units makes adjusting the base font size easier, instantly scaling all text.

Accessibility

Choose a font size that’s easily readable. Small text can strain users’ eyes, especially on mobile devices. Aim for at least 16px or an equivalent for body text.

Key Takeaways

  • Readability: Adequate font sizes improve user comfort.
  • Relative Units: em, rem, and percentages support responsive design.
  • Accessibility: Larger fonts help all users, including those with visual impairments.
Prev Next