Choosing fonts can feel like a leap in the dark. There are thousands of typefaces, and the wrong pair can make a poster or a page look muddled. The good news is that you do not need a large collection. A well-chosen pair, used with restraint, will carry most projects. Here are practical principles for choosing and combining typefaces without any special training.

Start with the job

Before you pick a font, think about what the text must do. A headline on a poster has to attract attention. A paragraph in a booklet has to be read comfortably for several minutes. An exhibition label has to be clear at a glance. Different jobs suit different faces. Display faces, with strong personality, work in short bursts at large sizes; text faces are designed to be unobtrusive over long passages.

Serif and sans serif

Typefaces are often divided into those with small finishing strokes on the letters, called serifs, and those without. Serif faces are often associated with tradition and warmth, while sans serifs feel clean and modern. Neither is better. For a simple, dependable pairing, combine one of each: a serif for body text and a sans for headings, or the reverse. The contrast between them makes it clear which is which.

The rule of restraint

Most designs need no more than two typefaces. You can create plenty of variety within a single family by using different weights, sizes and styles such as regular, bold and italic. Adding a third face rarely helps and often creates visual noise. If you find yourself wanting more, ask whether you can solve the problem with spacing or weight instead.

A step-by-step approach to pairing

Choose a clear, readable text face first, since it will carry most of the content.
Select a second face that contrasts with the first in style, not one that is almost the same.
Check that the two faces have a similar feel in proportion, so that they do not look as if they belong to different eras or moods.
Set up a sample with a heading, subheading and a paragraph, using the real sizes you intend to use.
Print it or view it on screen at actual size, and change anything that is hard to read.

Avoid near-misses

The most common mistake is pairing two fonts that are similar but not the same. A slightly different serif next to the first looks like an error, rather than a choice. Either use one family throughout or go for clear contrast. Similarly, avoid combining two highly decorative faces, because they will fight each other.

Use hierarchy and space

Typefaces work best when combined with clear structure. Size, weight and position tell readers where to start, so revisit the principles in our guide to visual hierarchy when you are setting a page. Generous margins and line spacing also matter. A good font in a cramped layout will look worse than a modest one with room to breathe, which echoes the ideas in using negative space.

Readability checks

Is the body text comfortable at the size you will actually use?
Is there enough contrast between the text and the background?
Do lines run to a sensible length, roughly 45 to 75 characters for reading comfort?
Do italic and bold styles look distinct and clear?

Frequently asked questions

Where can I find good free typefaces? Several reputable libraries offer open-licence fonts. Always check the licence before using a font in anything you plan to publish or sell.

Can I use two sans serif fonts together? Yes, if they differ enough in weight, width or character. Closely similar sans serifs tend to look accidental.

Does a font need to match the subject? It should suit the mood, but subtlety goes a long way. A quiet, well-set face usually serves a subject better than a novelty one.

Steps

Choose one typeface for text: Pick a clear, readable face that works at small sizes for the main body of your design.
Add a contrasting second face: Choose a second face with a clearly different character, such as a serif with a sans serif, for headings or accents.
Test at size: Set sample text at the real sizes you will use and check that both faces are legible and that the hierarchy is obvious.