Thai font · OFL

Trirong

ไตรรงค์

By Narongsak Chaiwong

Typography & Licensing Specialist, ThaiGraph · June 13, 2026

Information verified as of June 2026

What Trirong is

Trirong is a looped Thai serif from Cadson Demak, on Google Fonts since June 2016 with nine weights and matching italics under the SIL Open Font License. The name (ไตรรงค์) means “tricolor flag” in Thai and refers to the red, white, and blue flag of Thailand.

Cadson Demak drew Trirong with a narrow, tall structure that echoes traditional Thai typefaces. The compressed proportions save horizontal space without giving up the looped consonant heads Thai readers expect in formal text. Alongside Taviraj, it belongs to the group of formal looped serifs the Bangkok foundry contributed during Google Fonts’ Thai expansion of the mid-2010s.

The brief, according to Google’s own design notes, was a typeface that performs well in formal settings while staying economical on the page. That is a fair summary of how it behaves in production: official, upright, slightly ceremonial.

Character design and tone

Trirong combines thick-and-thin stroke contrast with a narrow, tall letter skeleton; loop terminals are drawn as ovals rather than circles, which keeps counters open at text sizes. The oval loops on ก, ถ, and ภ are the design’s signature detail — they compress the loop vertically so the narrow body still reads clearly.

The contrast gives Trirong a formal register closer to Pridi than to any sans, but the condensed skeleton makes it feel more official and less literary. Cadson Demak’s design notes warn that formal looped Thai faces carry delicate details that heavy weights can obscure, and the Black weight shows it: loops tighten, contrast flattens, and the face loses some of its precision. At the other extreme, Thin and ExtraLight run close to hairline and belong at display sizes only.

The Latin companion is a serif with matching contrast, and the family also covers Vietnamese. Bilingual formal documents hold together well because Thai and Latin share the same stroke logic.

Weights and availability

Trirong ships nine weights from Thin (100) to Black (900), each with a true italic — eighteen styles in total. Pridi, by comparison, ships six uprights and no italics, so Trirong is the wider system of the two free looped serifs.

All files are on Google Fonts; the source sits in the google/fonts repository. Subsets cover Thai, Latin, Latin Extended, and Vietnamese. For most editorial deployments, Regular, SemiBold, and Bold carry the hierarchy; the outer weights are display material.

How to download Trirong

Trirong is a free download from Google Fonts — no registration, no payment, full commercial rights under the SIL Open Font License. Three routes:

1. Google Fonts download — open the Trirong specimen, click “Get font”, and download the family ZIP with all eighteen static styles.
2. Google Fonts embed — load https://fonts.googleapis.com/css2?family=Trirong:ital,wght@0,100..900;1,100..900&display=swap in a <link> tag, then set font-family: 'Trirong', serif;.
3. GitHub source — the google/fonts repository hosts the TTFs and the OFL license file for self-hosting.

Best use cases

Trirong fits formal Thai print where vertical economy matters: certificates, programmes, institutional reports, and editorial headlines that need looped authority in tight columns. Strong briefs:

• Certificates, diplomas, and ceremonial print where looped Thai signals respect for convention
• Magazine and newspaper headlines where the narrow body buys characters per line
• Bilingual Thai-Latin annual reports and institutional publications
• Government-adjacent identity work that needs formality without Angsana-era nostalgia

Where it doesn’t fit: interface text and small screen sizes, where the hairline thins and tight counters break down; long body text below Light at print sizes; and modern consumer branding, which usually calls for a loopless sans like Kanit or Prompt.

Pairings

Trirong pairs with low-contrast Thai sans faces that let its formal serif texture lead. Three pairings:

• Kanit — geometric loopless sans for subheads and captions under Trirong headlines
• Sarabun — neutral looped sans for forms, tables, and body text below Trirong display
• Source Serif 4 — Latin serif with compatible contrast for mixed-language editorial

See /learn/typography/ for pairing guidance and the fonts directory for the full catalogue.

Licensing

Trirong is released under the SIL Open Font License: free for commercial use, modification, embedding, and bundling, provided the OFL notice stays with the files. The license file ships in the google/fonts repository next to the TTFs, and the Google Fonts specimen states the same terms. No paid tier exists.

Information verified as of June 2026