What size are IAB Standards Medium Rectangle ads?

IAB Standards Medium Rectangle ads are 300×250 pixels with an aspect ratio of 6:5.

What aspect ratio does IAB Standards Medium Rectangle use?

IAB Standards Medium Rectangle supports 6:5 aspect ratio.

What is the maximum file size for IAB Standards Medium Rectangle?

Files for IAB Standards Medium Rectangle can be up to 0.2 MB.

Which file formats does IAB Standards Medium Rectangle accept?

IAB Standards Medium Rectangle accepts JPG, PNG, GIF, and HTML files.

Where does IAB Standards Medium Rectangle appear on IAB Standards?

IAB Standards Medium Rectangle ads appear in the In-content / Sidebar placement on IAB Standards.

Where can I find the official IAB Standards Medium Rectangle documentation?

The official source for IAB Standards Medium Rectangle requirements is https://iabtechlab.com/standards/ad-portfolio/, linked from this page.

Are these IAB Standards Medium Rectangle specs kept up to date?

Yes — every spec entry references IAB Standards's official documentation source so dimensions, file size limits, and codec requirements stay in sync as the platform changes.

Can I reuse the same creative for other IAB Standards placements?

Often partially — many IAB Standards placements share aspect ratios but differ in safe zones, duration, or file size. Always cross-check the target placement's spec page before reusing creative.

IAB Standards Medium Rectangle ad specs

IAB Standards Medium Rectangle ads are horizontal 6:5 still images, measured at 300×250 px, up to 0.2 MB per file, delivered as JPG, PNG, GIF, or HTML. They run in the In-content / Sidebar placement on IAB Standards. Use these requirements to brief designers, validate uploads, and avoid creative rejections in IAB Standards's ad manager.

Dimensions: 300×250 px
Aspect ratio: 6:5
Max file size: 0.2 MB

Visual specifications

Dimensions	300 × 250 px
Aspect ratios	6:5
Orientation	landscape
Max file size	0.2 MB
File types	JPG, PNG, GIF, HTML

Notes & source

Most widely used IAB standard unit. Suitable for embedding within text content or in sidebars. Max initial load 200 KB.

Official source: https://iabtechlab.com/standards/ad-portfolio/

Frequently asked questions

What size are IAB Standards Medium Rectangle ads?: IAB Standards Medium Rectangle ads are 300×250 pixels with an aspect ratio of 6:5.
What aspect ratio does IAB Standards Medium Rectangle use?: IAB Standards Medium Rectangle supports 6:5 aspect ratio.
What is the maximum file size for IAB Standards Medium Rectangle?: Files for IAB Standards Medium Rectangle can be up to 0.2 MB.
Which file formats does IAB Standards Medium Rectangle accept?: IAB Standards Medium Rectangle accepts JPG, PNG, GIF, and HTML files.
Where does IAB Standards Medium Rectangle appear on IAB Standards?: IAB Standards Medium Rectangle ads appear in the In-content / Sidebar placement on IAB Standards.
Where can I find the official IAB Standards Medium Rectangle documentation?: The official source for IAB Standards Medium Rectangle requirements is https://iabtechlab.com/standards/ad-portfolio/, linked from this page.
Are these IAB Standards Medium Rectangle specs kept up to date?: Yes — every spec entry references IAB Standards's official documentation source so dimensions, file size limits, and codec requirements stay in sync as the platform changes.
Can I reuse the same creative for other IAB Standards placements?: Often partially — many IAB Standards placements share aspect ratios but differ in safe zones, duration, or file size. Always cross-check the target placement's spec page before reusing creative.