Spec library / IAB Standard Display / Medium Rectangle
IAB Standard Display Medium Rectangle ad specs
300×250 px. The most widely sold display unit; fits in-content and sidebar slots.
Pending verification. These values haven't been confirmed against the official source yet. Check the source before trafficking.
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| Sizes | 300×250 (Standard) 600×500 (2x retina, served at standard size) |
|---|---|
| Aspect ratio | 6:5 |
| Creative types | image, animated-image, html5 |
| File formats | jpg, png, gif, html5 |
| Max file size | Being verified |
| HTML5 initial load | Being verified |
| HTML5 subload | Being verified |