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1080×1080
shown at 20%
Feed Image - Square (1:1)
Square
- Size (px)
- Ratio
- 1:1
Microsoft Advertising — Image Extension - Square (1:1)
Square · Display · Verified 2026-06
Live preview
300×300
shown at 100%
In context
Sample feed post
Full specification
Size (px)
Ratio1:1
Max weight5 MB
FormatsJPEG, PNG
Text limits
Body
35 chars
Description
90 chars
Notes & best practice
Square crop of the image extension (SubType SquareImageMedia).
Minimum size is 300x300.
Used for mobile single-image rendering, where single images crop to a 1:1 square.
Add up to 4 image media IDs with different aspect ratios per extension to qualify for all placements.
Frequently asked questions
What size is the Microsoft Advertising Image Extension - Square (1:1)?
The Microsoft Advertising Image Extension - Square (1:1) is 300×300 px, aspect ratio 1:1.
What is the aspect ratio of the Microsoft Advertising Image Extension - Square (1:1)?
1:1. At the recommended resolution that is 300×300 px.
What is the maximum file size for the Microsoft Advertising Image Extension - Square (1:1)?
Up to 5 MB, in JPEG, PNG.
What file formats does Microsoft Advertising accept for the Image Extension - Square (1:1)?
JPEG, PNG.
Why does Microsoft Advertising crop my Image Extension - Square (1:1)?
Microsoft Advertising shows Image Extension - Square (1:1) at 1:1. Upload exactly 300×300 px and keep key content in the safe area so nothing gets cut off.
Is 300×300 still correct for the Microsoft Advertising Image Extension - Square (1:1) in 2026?
Yes. Last verified 2026-06 against the official Microsoft Advertising documentation.
Check your creative
Test a file against this exact spec before you upload it anywhere.
Nothing is uploaded or saved — the check runs entirely in your browser.