Where is the 300×600 format used?
The half page ad fills half the screen height in the sidebar, making it the most commanding standard size on desktop. Publishers typically price the slot above the smaller sidebar formats.
How much copy fits into 300×600?
| Headline (recommended) | 50 characters |
| Subline useful | ✓ |
| Product image useful | ✓ |
| Target file size | ≤ 90 KB (JPG) |
Enough canvas for imagery in the top half and a copy block with a button below.
Related sizes
Design tips for 300×600
- ✓Advertiser first: the logo or wordmark must be recognisable in under a second.
- ✓One message per design — headline, optional subline, one button.
- ✓Contrast over taste: text at least 4.5:1 against the background.
More Display / Affiliate formats
| FORMAT | SIZE | USE |
|---|---|---|
| Leaderboard | 728×90 | IAB |
| Medium Rectangle | 300×250 | IAB |
| Large Rectangle | 336×280 | IAB |
| Wide Skyscraper | 160×600 | IAB |
| Skyscraper | 120×600 | IAB |
| Mobile Banner | 320×50 | IAB |
| Large Mobile Banner | 320×100 | IAB |
| Full Banner | 468×60 | IAB |
| Super Leaderboard | 970×90 | IAB |
| Billboard | 970×250 | IAB |
| Square | 250×250 | IAB |
| Small Square | 200×200 | IAB |
| Panorama | 980×120 | DACH |
| Wallpaper Top | 800×250 | DACH |
Frequently asked questions
- When does the premium for 300x600 pay off?
- For considered purchases and for brand work. The doubled height lets you show a large image and still make three points, whereas 300x250 forces you to pick one.
- How should I divide the space?
- Thirds work well: image on top, headline and benefits in the middle, logo and button at the bottom. That keeps the call to action visible even when only the lower part of the ad is in the viewport.
- Which file format and file size?
- myfeedr delivers 300×600 as PNG (lossless) and JPG. For trafficking, the JPG is what counts: around 90 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 "Starter" package from 79 €. Analysing your website is free.
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