IAB Standard Large Rectangle Ad Size
336×280px · 336:280
The recommended size for IAB Standard Large Rectangle ads is 336×280px (ratio 336:280). Accepted file format: JPG, PNG, GIF, with a maximum file size of 150KB.
Placement spec
| Recommended size | 336×280px |
|---|---|
| Aspect ratio | 336:280 |
| File format | JPG, PNG, GIF |
| Max file size | 150KB |
Frequently asked questions
What is the correct size for IAB Standard Large Rectangle ads?
The recommended size is 336×280px with a 336:280 aspect ratio.
What are the file format and size limits?
Accepted file format: JPG, PNG, GIF, with a maximum file size of 150KB.
Can I convert an existing banner to this size automatically?
Upload your original banner to ImageFactory banner resize and it is automatically converted to 336×280px and 1,400+ other placement sizes. For placements with a safe zone, AI keeps key elements inside the safe area.