Since January 2025 the Instagram profile grid shows every post as a 3:4 tile, so any photo that is not 3:4 gets cropped in the preview: a 4:5 post loses a thin strip on each side, a square loses a quarter of its width, and a landscape photo keeps only its middle. Since May 2025 you can also upload 3:4 natively at 1080×1440, which fills a tile with no crop at all. The post itself is never changed; tap it and the full photo is there. The grid is just a different window onto it.
That one fact explains most "Instagram cropped my photo" and "Instagram shrank my photo" complaints. Here is what changed, what it does to each shape, and how to export so both the feed and the grid look right.
What changed in January 2025
In January 2025 Instagram replaced the square grid it had used since the beginning with rectangular 3:4 tiles. Adam Mosseri's explanation was simple: most of what people upload, photos and videos alike, is vertical, and square tiles were cutting the top and bottom off almost everything.
The change applied to every profile and every existing post. Old posts were not re-encoded, but their grid thumbnails were re-cut to 3:4 from the centre of the image. That is why a feed of carefully squared photos suddenly looked wrong overnight. Alongside the new grid Instagram added Adjust preview, which lets you choose which part of a post the tile shows, and a Fit option that shows a non-3:4 image whole with bars above and below.
What changed in May 2025
In May 2025 Instagram started accepting 3:4 photos as they are. Before that, the feed only allowed ratios between 1.91:1 and 4:5, so a 3:4 photo, which is what almost every phone camera shoots, had to be trimmed to 4:5 on upload. Mosseri's line at the time: upload a 3:4 image and it now appears exactly as you shot it.
The practical size is 1080×1440. It works for single posts and for carousels, and it fills the grid tile exactly. The 3:4 size page exports that size with the crop, sharpening and file size handled.
What the grid does to each ratio
The tile is 3:4 (width to height, 0.75). Anything wider than that loses width at the sides; anything taller loses height at the top and bottom. In pixels, for a 1080 px wide upload:
| You post | The grid tile shows | What you lose |
|---|---|---|
| 3:4 (1080×1440) | The whole photo | Nothing |
| 4:5 (1080×1350) | The centre 1012×1350 | About 34 px on each side, roughly 6% of the width |
| 1:1 (1080×1080) | The centre 810×1080 | 135 px on each side, a quarter of the width |
| 1.91:1 (1080×566) | The centre 424×566 | About 60% of the width |
| 9:16 reel cover (1080×1920) | The centre 1080×1440 | 240 px at the top and 240 px at the bottom |
Two things to take from the table. A 4:5 post is barely affected, which is why it is still a perfectly good default. And squares and landscapes are affected a lot, which is why people with years of square posts noticed the change most.
"Why does Instagram shrink my photos?"
Shrinking and cropping get mixed up, and Instagram does both.
In the feed, a landscape 1080×566 photo is shown as a narrow strip, and a square is shown noticeably smaller than the 4:5 and 3:4 posts around it. Nothing has been shrunk; the shapes simply take up less of the screen. Tall shapes get the most space, which is the main reason to post 4:5 or 3:4.
In the grid, every tile is a thumbnail, so everything is small. If you chose Fit for a square, it is shown whole inside a 3:4 tile with bars, so it appears smaller still. That is the trade: whole and small, or cropped and full.
And on the server, any photo wider than 1080 px is scaled down to 1080 px. That is the only real shrinking Instagram does, and it is invisible if you export at 1080 px yourself. The why Instagram compresses photos guide covers that side.
How to design for both the feed and the grid
Rule: compose for the 3:4 centre. Anything that must survive the grid (faces, text, logos, product) stays inside the middle 3:4 of the frame, whatever ratio you post.
- Post 3:4 when the grid matters. Portfolios, shops, anything where people judge you by the profile page. 1080×1440 fills the tile and the feed shows it full height on current builds. Keep essential detail a few percent away from the top and bottom edges, because some older app versions trim 3:4 slightly toward 4:5 in the feed.
- Post 4:5 when you already work at 4:5. Keep important elements about 40 px in from the left and right edges and the grid crop will never touch them.
- Squares: choose Fit or recrop. A library of squares looks fine with Fit as long as every tile uses it; mixing cropped and fitted squares looks messy. For new work, recrop to 3:4 from the original file rather than padding a square.
- Landscape: pad it yourself. If a wide photo has to go in the grid whole, place it on a 1080×1440 canvas with a plain background, so you decide the bars instead of Instagram. Otherwise accept that the tile shows the centre and put the subject there.
- Reel covers: design the title inside the centre 1080×1440 of the 1080×1920 cover. The reel cover page draws that box on the preview.
Carousels in the grid
The grid shows the first slide of a carousel, cropped exactly like a single post. So the cover slide follows the same rule: 3:4 fills the tile, 4:5 loses a sliver each side, and a landscape first slide shows only its middle. Because every slide in a carousel normally shares the first slide's ratio, choosing 3:4 or 4:5 for slide one settles it for the whole set. The carousel size guide covers the rest, including the newer mixed-ratio option.
Fixing an existing post with Adjust preview
- Open the post from your profile.
- Tap the three dots at the top right.
- Tap Adjust preview (on some builds it is inside Edit).
- Drag the photo to choose which part the tile shows, or tap Fit to show the whole image with bars.
- Tap Done. Only the grid thumbnail changes; the post and its comments stay as they were.
For a profile full of old squares, doing this once per post is tedious but it is the only way to fix them without reposting.
Exporting a grid-safe post
The tool below exports 1080×1440 (or 1080×1350 if you prefer 4:5). Drop the original photo, drag the preview to place the crop, and download or share straight to Instagram. It resizes in steps, sharpens the final pixels and lands the JPEG between 500 KB and 1 MB, so the grid tile is cut from a file that Instagram had no reason to soften. Nothing is uploaded; it runs in your browser.
What you cannot change
The grid is 3:4 for everyone and there is no setting to bring the square grid back. You also cannot give one post a different tile shape from the rest; every tile is 3:4, and Fit only changes what is inside it. And nothing you do after posting changes the pixels Instagram stored: Adjust preview moves a window over the same image. If the image itself is soft, the fix is a clean re-upload, not a better crop.
Checklist
- Grid tiles are 3:4 since January 2025; native 3:4 posts (1080×1440) since May 2025
- 4:5 loses about 34 px per side in the grid; squares lose a quarter of their width unless you choose Fit
- Keep faces, text and logos inside the centre 3:4 of any post
- Use Adjust preview to fix old posts; Fit for squares you want whole
- Export 1080×1440 or 1080×1350, JPEG, sRGB, 500 KB to 1 MB
Post 3:4 and the grid crop stops existing. Post 4:5 with a little edge margin and you will never notice it.