Tirra
Tirra is a sans serif font in 6 weights. Its lowercase letters are 6% narrower than the typical sans serif font. Last updated 26 August 2025.
Editing a PDF that uses Tirra
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 Tirra from the widths stored in your PDF, loads the complete open font, and sets your new text in Tirra itself. The rest of the page is carried over untouched.
Measured metrics
| Average lowercase letter width | 486.3 units per 1000 em |
|---|---|
| Average capital letter width | 584 units per 1000 em |
| Word space | 322.3 units per 1000 em |
| Digits | tabular (every digit is 508.8 units wide, so columns of numbers line up) |
| Spacing | proportional |
| Width of i compared with m | 30% |
| Printable ASCII characters covered | 94 of 94 |
| Category | Sans serif |
Weights and styles
Languages beyond basic Latin
Open fonts closest to Tirra
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.
- Akatab Regularidentical letter widths (0 units)
- Mada Regularvery close widths (8.4 units)
- Source Sans 3 Regularvery close widths (8.5 units)
- Assistant Regularvery close widths (8.9 units)
- Varta Regularvery close widths (9.2 units)
- Source Sans Pro Regularvery close widths (11 units)
- Chiron Hei HK Regularsimilar widths (15.8 units)
- Kedebideri Regularsimilar widths (17.2 units)
Compare Tirra
Questions people ask
+Can I edit a PDF that uses Tirra?
Yes. Drop the PDF into MythosPDF and click the text. New letters are set in Tirra itself, loaded from the open font, so the edit matches the rest of the page.
+Is Tirra free to use?
Tirra 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 Tirra?
By measured letter widths, Akatab 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 Tirra support?
It includes these character sets: Latin, Central European, Tifinagh.
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