Where is the 1200×400 format used?
The full-width header runs in email templates that exceed the classic 600 pixels or bleed the image across the entire message width. It also serves as the high-resolution source for smaller headers.
How much copy fits into 1200×400?
| Headline (recommended) | 60 characters |
| Subline useful | ✓ |
| Product image useful | ✓ |
| Target file size | ≤ 130 KB (JPG) |
Compose across the width and centre the copy, because narrow clients crop the outer edges.
Related sizes
Design tips for 1200×400
- ✓Always 600 px wide (1200 px for retina) — wider images are not scaled in Outlook.
- ✓Important copy belongs in the HTML text, not in the image: many clients block images at first.
- ✓Keep files small, ideally under 100 KB — email clients load all images at once.
More Newsletter formats
| FORMAT | SIZE | USE |
|---|---|---|
| Newsletter Header | 600×200 | |
| Newsletter Hero | 600×300 | |
| Newsletter Tile | 600×400 | |
| Newsletter 16:9 | 640×360 | |
| Newsletter Module | 300×300 | |
| Newsletter Footer | 600×150 |
Frequently asked questions
- Why would an email need 1200 pixels of width?
- Two reasons: full-width templates, and sharp rendering on high-density screens. For the second case you place the graphic at 600 pixels in the HTML and ship it at double resolution.
- How do I avoid slow loading?
- Export as JPG rather than PNG, aim for around 130 KB, and avoid gradients with fine tonal steps. Email is often opened on the move, and a heavy header holds up the entire render.
- Which file format and file size?
- myfeedr delivers 1200×400 as PNG (lossless) and JPG. For trafficking, the JPG is what counts: around 130 KB is a realistic target for this size – small enough for any network without visible quality loss.
- What does the format cost?
- Formats are not sold individually — :size is part of the "Complete" package from 349 €. Analysing your website is free.
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