Source Serif 4 and Fira Sans font pairing
Serif headings with a sans serif body.
Good pairings feel inevitable. Great ones set the tone before a single word is read.
Typography sets the tone before a single word is read. A strong pairing creates clear hierarchy while feeling like one consistent voice across every page. This paragraph is set in Fira Sans, while the headline uses Source Serif 4. Numbers like 0123456789, punctuation “quotes” — and ampersands & — reveal a lot about how two typefaces get along.
Look for contrast in structure and harmony in proportion: similar x-heights, compatible widths and a shared sense of rhythm. Bold text and italic text should feel natural, too.
Why this pairing works
A classic contrast: Source Serif 4's serifs give headlines an editorial, trustworthy voice while Fira Sans's clean shapes keep body text easy to scan on screens. Fira Sans ships in 9 weights, so you can build captions, buttons and emphasis without adding another family.
HSource Serif 4
Source Serif 4 is a free serif typeface designed by Frank Grießhammer, added to Google Fonts in 2021. It comes in 8 weights with matching italics, and is a variable font with optical size and weight axes.
More pairings for Source Serif 4 →BFira Sans
Fira Sans is a free sans serif typeface designed by Carrois Apostrophe, added to Google Fonts in 2014. It comes in 9 weights with matching italics.
More pairings for Fira Sans →Use this pairing on your website
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link href="https://fonts.googleapis.com/css2?family=Source+Serif+4:wght@700&family=Fira+Sans:wght@400;700&display=swap" rel="stylesheet">h1, h2, h3 {
font-family: 'Source Serif 4', serif;
font-weight: 700;
}
body {
font-family: 'Fira Sans', sans-serif;
font-weight: 400;
line-height: 1.6;
}More pairings with Source Serif 4
Typography sets the tone before a single word is read. A good pairing feels like one voice.
An expressive grotesque headline with a highly readable modern serif body.
Typography sets the tone before a single word is read. A good pairing feels like one voice.
A modern, slightly condensed sans for UI and headings over a refined text serif.
Typography sets the tone before a single word is read. A good pairing feels like one voice.
A geometric tech sans with a serif that keeps long text comfortable.
More pairings with Fira Sans
Typography sets the tone before a single word is read. A good pairing feels like one voice.
A classic contrast: Faustina's serifs give headlines an editorial, trustworthy voice while Fira Sans's clean shapes keep body text easy to scan on screens.
Typography sets the tone before a single word is read. A good pairing feels like one voice.
A classic contrast: PT Serif's serifs give headlines an editorial, trustworthy voice while Fira Sans's clean shapes keep body text easy to scan on screens.
Typography sets the tone before a single word is read. A good pairing feels like one voice.
A modern twist on the classic: Fira Sans keeps headings crisp and contemporary, while Playfair Display's serifs guide the eye along longer lines of text.
Frequently asked questions
Do Source Serif 4 and Fira Sans go well together?
A classic contrast: Source Serif 4's serifs give headlines an editorial, trustworthy voice while Fira Sans's clean shapes keep body text easy to scan on screens. Fira Sans ships in 9 weights, so you can build captions, buttons and emphasis without adding another family.
Which font should be used for headings?
Use Source Serif 4 for headings at weight 700, and Fira Sans for body text at weight 400. You can swap them in the pairing tool to compare.
Are Source Serif 4 and Fira Sans free?
Yes — both are open-source fonts on Google Fonts and free for personal and commercial use.