Saira
Saira is a sans serif font in 9 weights with italics, also available as a variable font. Its lowercase letters are about as wide as the typical sans serif font. Last updated 18 November 2025.
Editing a PDF that uses Saira
Most PDFs embed only the letters they already use. Type a new letter and many editors either refuse or swap in a different font. MythosPDF recognises Saira from the widths stored in your PDF, loads the complete open font, and sets your new text in Saira itself. The rest of the page is carried over untouched.
Measured metrics
| Average lowercase letter width | 526.5 units per 1000 em |
|---|---|
| Average capital letter width | 650.6 units per 1000 em |
| Word space | 235 units per 1000 em |
| Digits | proportional (digit widths differ) |
| Spacing | proportional |
| Width of i compared with m | 29% |
| Printable ASCII characters covered | 94 of 94 |
| Category | Sans serif |
Weights and styles
Languages beyond basic Latin
Open fonts closest to Saira
Measured on every printable character both fonts contain. A smaller difference means the same words take the same space, so lines break in the same places.
- Saira Stencil Regularidentical letter widths (0 units)
- Public Sans Regularsimilar widths (28.6 units)
- Bricolage Grotesque Regularsimilar widths (29 units)
- Exo Regularloosely similar widths (30.3 units)
- Saira Stencil One Regularloosely similar widths (30.6 units)
- Libre Franklin Regularloosely similar widths (31.2 units)
- Miranda Sans Regularloosely similar widths (31.4 units)
- Radio Canada Big Regularloosely similar widths (32.3 units)
Compare Saira
Questions people ask
+Can I edit a PDF that uses Saira?
Yes. Drop the PDF into MythosPDF and click the text. New letters are set in Saira itself, loaded from the open font, so the edit matches the rest of the page.
+Is Saira free to use?
Saira is released under the SIL Open Font License 1.1, an open licence that allows free use in documents, including commercial ones. Check the licence text for your exact use.
+Which font is closest to Saira?
By measured letter widths, Saira Stencil is the closest match among open fonts (a mean difference of 0 units per 1000 em). Text set in one takes almost the same space in the other.
+Which languages does Saira support?
It includes these character sets: Latin, Central European, Vietnamese.
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