What is the best font for an email signature?

Arial is the safest choice: supported on every OS, renders cleanly at 12–14px, and looks identical across Outlook, Gmail, and Apple Mail. Georgia works well for legal and finance contexts. Verdana is readable at small sizes. All three are web-safe fonts that email clients can render without loading external files.

Can I use Google Fonts in an email signature?

No. Google Fonts load via a stylesheet or @font-face declaration — both are stripped by Gmail and ignored by Outlook's Word rendering engine. When the custom font fails to load, email clients fall back to a system default (usually Times New Roman or a serif), which breaks your layout. Use web-safe fonts only.

What font size should an email signature use?

Name: 16–18px, weight 600–700. Job title: 13–14px, weight 400. Contact details (phone, email, website): 12–13px. Disclaimer text if present: 10–11px. Do not go below 10px — many email clients have a minimum rendering size and will auto-scale up, breaking your layout.

Best Font for an Email Signature

Email clients do not load external fonts. Outlook uses the Word HTML rendering engine — it ignores @font-face entirely. Gmail strips <link> tags and <style> blocks. Apple Mail supports some web fonts, but you cannot target it independently without breaking Outlook. The only fonts that render consistently across all clients are web-safe system fonts — fonts pre-installed on the OS.

Updated: March 2026·~4 min read

Quick Answer

Use Arial, Helvetica, sans-serif for the body. Set name at 16–18px weight 600. Body text at 12–14px weight 400. Do not use Google Fonts — they will not load in Outlook or Gmail.

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Web-Safe Fonts for Email Signatures

These fonts are installed on Windows, macOS, iOS, and Android by default. No external loading required — the email client renders them directly from the OS font library.

ArialArial, Helvetica, sans-serif

Default recommendation. Clean, neutral, universally available. Best for corporate, tech, and general professional use.

VerdanaVerdana, Geneva, sans-serif

Wide letterforms designed for screen readability. Slightly larger apparent size than Arial at the same pixel value. Good for small-size contact details.

Trebuchet MSTrebuchet MS, Lucida Sans Unicode, sans-serif

Humanist sans-serif with slight personality. Not on all Android devices — always include sans-serif fallback.

GeorgiaGeorgia, Times New Roman, serif

Serif option. Common in legal, finance, and academic signatures. Readable at small sizes. Feels more traditional than Arial.

Times New RomanTimes New Roman, Times, serif

Standard serif fallback. Available everywhere but can appear dated. Acceptable for legal disclaimers and formal institutional signatures.

Why Google Fonts and Custom Fonts Fail

Outlook (all desktop versions)

Uses Microsoft Word's HTML rendering engine. Completely ignores @font-face rules and external stylesheet links. Falls back to the OS default serif (usually Times New Roman) when a font is not installed.

Gmail

Strips all <style> blocks and <link> tags from incoming emails. Google Fonts load via a <link> tag — that tag is removed before rendering. Falls back to Arial.

Apple Mail

Supports @font-face web fonts — but only when the sender's server also serves the font files with correct CORS headers. Because you cannot guarantee this, and because Outlook won't load them anyway, custom fonts in Apple Mail create an inconsistent experience.

Outlook Web / OWA

Browser-based, so technically supports some web fonts. But since desktop Outlook doesn't, targeting OWA specifically with custom fonts creates a two-tier experience that's impossible to maintain.

Font Size Specifications

Element	Size	Weight
Full name	16–18px	600–700 (bold)
Job title	13–14px	400 (normal)
Company name	13–14px	500 or 400
Phone / email / website	12–13px	400
Disclaimer / legal text	10–11px	400

Do not go below 10px. Some email clients have minimum font size enforcement and will auto-scale small text up, breaking line spacing and layout.

How to Write Font Styles Correctly for Email

All font styles must be written as inline style attributes. CSS classes and <style> blocks are stripped by Gmail and ignored by Outlook.

<p style="font-family:Arial,Helvetica,sans-serif;font-size:17px;font-weight:700;color:#1a1a1a;margin:0;">Jane Smith</p>
<p style="font-family:Arial,Helvetica,sans-serif;font-size:13px;font-weight:400;color:#555555;margin:0;">Senior Marketing Manager</p>

Frequently Asked Questions

Can I use Open Sans or Roboto in my email signature?

No. Both are Google Fonts loaded via external stylesheet. They will not render in Outlook (any version) or Gmail. Specify them in a font stack with a web-safe fallback — but the fallback is what recipients will actually see in most clients.

Is Arial too boring for a professional signature?

Arial is neutral, not boring. Signature design quality comes from layout, color, spacing, and logo — not the font. A well-structured Arial signature looks more professional than a broken custom-font signature. Reserve font personality for your website.

Should I use the same font as my company brand font?

Only if your brand font is a web-safe font (e.g. Georgia, Arial). If your brand uses Circular, Proxima Nova, or any other non-system font, use the closest web-safe equivalent in your signature: Proxima Nova → Arial, Playfair Display → Georgia.

Related Guides

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