Release Date: July 15th, 2026

The following file size limits apply to first-party creatives uploaded directly to the platform:

• Video Hosted: Maximum file size of 200 MB
• Audio Hosted: Maximum file size of 200 MB
• HTML5: Maximum file size of 200 MB
• Image/Banner Hosted: Maximum file size of 5 MB

For Native creatives, image dimensions and aspect ratios are validated during upload.

Icons

• Must be square
• Must be between 50 × 50 pixels and 200 × 200 pixels

Images

• No side may exceed 1200 pixels
• Must use one of the following supported aspect ratios:
  • 1:1 (square)
  • 4:3
  • Approximately 1.91:1

Files that do not meet these requirements may not be accepted during the creative upload process.