Facebook ad size
Square works across feed placements; 4:5 uses more height.
Cropped in your browser · your image is never uploaded
1080 × 1080 for the feed and 1080 × 1920 for stories and Reels. Meta will auto-crop one creative across placements, but the results are frequently poor and it is worth supplying both.
How to use the facebook ad size
Automatic placements save time and cost quality: a square feed image stretched into a 9:16 story gets padded or cropped, and text near an edge routinely ends up under the interface. Supplying at least a square and a vertical is the minimum for a campaign you care about. The old 20 percent text rule is no longer a hard rejection — Meta removed it — but text-heavy images still measurably underperform in the auction, so the guidance survives its own enforcement. Note also that the right column placement uses a different 1.91:1 ratio again.
Questions
1080 × 1080 for feed placements and 1080 × 1920 for stories and Reels.