Instagram Grid Size: The 3:4 Profile Change Explained
Instagram's profile grid is no longer square. Here is the new grid size and ratio, what it crops from your posts, and what it means if you split a photo into nine.
Your profile grid used to be squares. It isn’t any more, and if you have ever built a nine-tile grid that looked perfect in your editor and wrong on your profile, this is why.
For a centred 3:4 portrait thumbnail, a square post keeps its full height and loses 12.5% of its width on each side. This page explains that geometry. Check the thumbnail on your own account: available adjustments and the displayed crop can differ.
Instagram grid dimensions and ratio
| What | Ratio (w:h) | Pixels |
|---|---|---|
| Profile grid thumbnail | 3:4 | displayed portrait |
| Feed post — portrait | 4:5 | 1080 × 1350 |
| Feed post — square | 1:1 | 1080 × 1080 |
| Feed post — landscape | 1.91:1 | 1080 × 566 |
| Grid-safe area inside a 4:5 post | 3:4 | 1012.5 × 1350 |
Those are the Instagram grid dimensions that matter. These calculations assume a centred 3:4 thumbnail, as simulated by our tool. Thumbnail adjustments on your account can change which part of the image appears. The safe-area row is the one that explains everything else. A 4:5 post is 1080 px wide and 1350 px tall. The grid crops it to 3:4, and 1350 × 0.75 = 1012.5 — the height is untouched and the width comes in. The grid crops the sides, not the top and bottom. Plenty of guides say the opposite; the arithmetic says otherwise, and you can confirm it on your own profile in about ten seconds.
What it does to each post shape
- 4:5 portrait (1080 × 1350) — loses roughly 34 px from each side. Barely noticeable. This is why 4:5 is the recommended shape now.
- 1:1 square (1080 × 1080) — keeps the full 1080 height, crops to 810 wide. You lose 135 px from each side, a quarter of the width.
- 1.91:1 landscape — loses a great deal from both sides. Landscape posts look worst on a grid, and always have.
The full image is unaffected. Tap the post and you see everything you uploaded; the crop applies only to the thumbnail in the grid.
What this means for a 3×3 grid
This is the part that matters if you split one photo across nine posts.
Nine square tiles assembled on your profile no longer join seamlessly. Each tile keeps its full height but loses 12.5% off each side, so a vertical band disappears between every column. Horizontal continuity breaks; vertical continuity is fine.
Practically:
- Compositions that flow top-to-bottom still work — a waterfall, a skyline gradient, a tall subject.
- Compositions that depend on horizontal continuity suffer — a panorama spread across a row, a face spanning two columns, text running sideways.
- Keep anything critical away from the vertical cut lines. The middle 75% of each tile is what people see on your profile.
There is a way to lose much less. Because a 4:5 post is only trimmed by about 3% per side, a grid built from 4:5 tiles survives the crop far better than one built from squares. The trade-off is that the tiles are portrait in the feed as well, which suits some images and not others.
Our grid maker exports square tiles up to 1080×1080. Compare Full square tiles and Profile crop (3:4) to see the effect on your own image. The latter is a centred crop simulation, not a change to the files. If that preview breaks a face, line or word across columns, change the composition or prepare files for your intended thumbnail crop rather than expecting square exports to solve it.
Source resolution for a split grid
The grid crop does not change the resolution arithmetic. You still need enough pixels to fill every piece at 1080.
| Layout | Assembled size | Minimum source |
|---|---|---|
| 3×3 of squares | 3240 × 3240 | 3240 px on the short side |
| 3×3 of 4:5 tiles | 3240 × 4050 | 3240 × 4050 |
| 1×3 panorama carousel | 3240 × 1350 | 3240 px wide |
| 2×3 grid | 3240 × 2160 | 3240 × 2160 |
Fall short and each piece exports below 1080, Instagram upscales it, and everything looks soft. There is more on that in does Instagram ruin photo quality.
Grid size vs post size
Two different questions that get asked with almost the same words:
- Grid size — how big and what shape the thumbnails on your profile are. This guide models a 3:4 thumbnail; check the crop and available adjustments on your account.
- Post size — what you upload. That is 1080 × 1350, 1080 × 1080, or 1080 × 566, and you do control it.
You design a post, Instagram derives the thumbnail. If you want the full breakdown of every upload dimension — Stories, Reels, carousels, profile picture — that is in Instagram image sizes.
Check it yourself
Do not take anyone’s word for it, including this page. Post a square image with something recognisable near the left and right edges — a border, a word, a marker. Look at your profile. Compare the edges in the thumbnail with the full post. If thumbnail adjustments are available, check how changing them affects that comparison.
That ten-second test tells you exactly what your own account is doing, which matters because Instagram rolls changes out unevenly and continues to adjust them.
Quick reference
- Preview model: centred 3:4, cropped from the sides
- Safe area inside a 4:5 post: 1012.5 × 1350
- Square post on the grid: keeps 810 of 1080 px wide
- A 4:5 post in a centred 3:4 preview: about 3.1% cropped from each side
- 3×3 split from squares: expect a lost band between columns
- Source for a 3×3: 3240 px minimum on the short side