HTML element · data last changed 10 Nov 2026
<small> in email clients
Works in 20 of 21. Untested in Superhuman.
caniemail (MIT) via @emailens/engine 0.18.22
No signup · Five clients free, Outlook Classic included · All 21 with an account
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<small> is not among the 24 features we have screenshotted on real installs. The ones we have →
All 21 clients, problems first
| Client | Support |
|---|---|
| Superhuman | Untested |
Works in 20: Gmail, Gmail Android, Gmail iOS and 17 more. Show all
| Client | Support |
|---|---|
| Gmail | Works |
| Gmail Android | Works |
| Gmail iOS | Works |
| Outlook 365 | Works |
| Outlook (New) | Works |
| Outlook Classic | Works |
| Outlook iOS | Works |
| Outlook Android | Works |
| Outlook for Mac | Works |
| Apple Mail | Works |
| Apple Mail iOS | Works |
| Yahoo Mail | Works |
| Yahoo Mail Android | Works |
| Yahoo Mail iOS | Works |
| Samsung Mail | Works |
| Thunderbird | Works |
| HEY Mail | Works |
| Proton Mail | Works |
| AOL Mail | Works |
| Fastmail | Works |
How <small> behaves
The <small> element semantically represents side comments and small print. Most email clients respect the default smaller rendering, but font-size differences between clients make it unreliable for precise sizing. Production email templates typically style <small> explicitly or replace it with <span> for consistent rendering.
- Default <small> font-size is typically 0.83em but varies between clients.
- Some clients strip the <small> wrapper entirely in their sanitizer pass, leaving content at parent font-size.
- Apple Mail respects <small> consistently; Outlook Classic applies Word-style scaling.
Set font-size and color explicitly on <small> elements rather than relying on default styling. Where pixel precision is required, replace <small> with a <span style="font-size:11px;color:#888">.
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