Header guide
Email signature banner header size: 600×120
Everything you need to design a Email signature banner banner that looks great on every device — exact dimensions, safe areas to avoid, and how the image actually crops on phones, tablets, and desktops.
Recommended size
600 × 120px
Aspect ratio
5.00:1
Devices we audit
4
How Email signature banner crops your header
Email signature banner renders the same image differently across devices. We test 4 unique device profiles (2 phone) (2 desktop).
| Device | Type | Display size | Safe areas |
|---|---|---|---|
| Gmail desktop | desktop | 600×120 | None |
| Gmail mobile | phone | 360×72 | Gmail crops to ~ 60% |
| Outlook desktop | desktop | 540×108 | None |
| Apple Mail iPhone | phone | 380×76 | None |
Design tips for Email signature banner
- •Keep critical content centered. Mobile and desktop crop different portions of your image. Putting your key visual or text in the center buys you the most safety.
- •Mind the profile picture overlay. Most platforms place a profile photo on top of the lower-left of your banner. Don't put logos or text there.
- •Watch the Dynamic Island & status bar. On iPhones the top of your banner sits behind the status bar and (on Pro models) the Dynamic Island.
- •Export at 2× or 3×. Save at twice the recommended size and let the platform downscale, so the image stays crisp on retina displays.
Test your Email signature banner header
Upload your banner and Better Header will check it against every Email signature banner device profile. First audit's on us.
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