Instagram quietly pushed out a new post dimension and it’s already changing how content performs. The platform now allows 1080×1440 (3:4) uploads, taller than both 1080×1080 and 1080×1350 and that extra height makes a real difference on the feed. With reach dropping for almost everyone, even a small shift in how much space your post occupies can decide whether people pause or swipe past without a second look.

The Shift to a Taller Format

This new format doesn’t feel dramatic until you see it in the feed. It sits between a regular portrait post and a full vertical layout, but the way it stretches just a bit more than the usual 4:5 instantly gives it presence. That extra room lets your visuals breathe and the post simply stands taller than everything around it. On a fast moving feed, that advantage is bigger than it sounds.

Why Taller Content Performs Better

Creators who’ve tested this size for a few weeks have noticed the difference. A taller frame stays on screen longer because the user needs an extra swipe to move past it. That tiny delay buys you attention and attention buys you reach. Nothing tricky here, no algorithm games, no hidden hack. It’s just the physics of screen space, the more of it you occupy, the harder you are to ignore.

The Ad Limitation You Can’t Ignore

Here’s the part most people miss, 1080×1440 posts can’t be boosted or used as ads. Meta’s ad placements still cap vertical creatives at 4:5, so this new size falls outside the supported range. If boosting is part of your routine, don’t switch your entire strategy to this format. Keep 1080×1350 for anything paid and use 1080×1440 only when you want pure organic reach.

Technical Rules for Carousels

Carousels follow one simple rule, the first slide decides the ratio for the rest. If you start with 1080×1440, every slide must match or Instagram will crop it. Also, the feed preview and profile grid frame things slightly differently, so keeping key elements centered is the safest way to avoid odd trimming or misplaced text.

Conclusion

This update is small, but the advantage is real. If you want more organic visibility without changing your entire content approach, the 1080×1440 format is an easy switch that gives you instant impact. Use it while most creators are still stuck on the old sizes.