What matters
Instagram Ad — Feed dimensions at a glance
Instagram feed ads at 1080×1080 blend with organic posts. For maximum screen real estate, 1080×1350 (4:5) often outperforms square, but square is the safer starting point.
Instagram's audience expects high visual quality. Correctly sized, native-feeling ads get significantly better engagement than obviously promotional content.
Wrong dimensions trigger auto-cropping that can cut off product shots or CTA elements. Low-quality images feel immediately out of place on Instagram.