You spent an hour building the perfect ten-slide carousel, then Instagram lopped the top off every image the moment you posted it. It is one of the most common and most frustrating layout problems on the platform, and it almost always traces back to a single decision made on the very first slide. The good news is that once you understand how Instagram treats a carousel as a set, the fix is simple and repeatable. This guide walks through the correct Instagram carousel dimensions, why picking one aspect ratio for the whole set matters, and how to build a clean swipe-through panorama that lines up edge to edge.
Why Instagram crops your carousel
Here is the rule that changes everything: a carousel locks to the aspect ratio of the first slide. When you add your opening image, Instagram reads its proportions and applies that same frame to every slide that follows. If slide one is a tall portrait and slide three is a wide landscape, slide three does not get its own frame. It is squeezed into the portrait shape set by slide one, and whatever falls outside that box is cropped away.
This is why mixing ratios is the number one cause of unexpected cropping. The app is not making a mistake or being unpredictable; it is doing exactly what it is designed to do, which is keep the swipe experience visually consistent. The takeaway is straightforward: make every slide the same aspect ratio before you upload, and the crop disappears.
The one rule that fixes everything: pick a single ratio
Decide on one aspect ratio for the entire set and export every slide to match it. You do not need to guess which slide Instagram will use as the reference, and you do not need to reorder anything to protect a wide image. If all slides share the same proportions, the reference slide is irrelevant because they all fit the same frame.
For most creators, two ratios cover nearly every situation:
- 4:5 portrait (1080 x 1350 pixels) is the recommended default. It occupies the most vertical space allowed in the feed, which means a larger, more thumb-stopping presence on a phone screen.
- 1:1 square (1080 x 1080 pixels) is the safe, classic option. It is predictable, works well for grids, and is easy to design for.
If you want the full reference for every placement, a quick look at the current Instagram carousel dimensions will confirm the exact pixel targets before you start designing, so you are not exporting to a size the app then resamples. Whichever ratio you choose, commit to it across all slides. The most common mistake is designing a few slides at 4:5 and a couple at 1:1 because they looked fine in isolation; in the carousel, the mismatch forces a crop on the odd ones out.
Recommended carousel sizes at a glance
| Ratio | Pixel size | Best for |
|---|---|---|
| 4:5 portrait | 1080 x 1350 | Maximum feed real estate; recommended default |
| 1:1 square | 1080 x 1080 | Grids, clean layouts, mixed content |
| Panorama tiles | 1080 wide, per slide | Seamless swipe-through images (see below) |
Across all of these, the constant is width: export at 1080 pixels wide. Instagram displays feed images at roughly that width, so 1080px gives the app clean pixels to work with. Going much larger mostly adds file weight, and going smaller invites softness and compression artifacts.
How to build a seamless panorama carousel
The swipe-through panorama, where one continuous image spans several slides and flows across the seams as you swipe, is one of the most eye-catching carousel formats. It looks complicated, but the method is mechanical.
Start with a single wide image, then slice it into tiles that are each 1080 pixels wide. The number of tiles is your slide count, so a three-slide panorama needs a source image 3240 pixels wide (three times 1080), a four-slide panorama needs 4320 pixels wide, and so on. Each tile keeps the same height, and that height sets your ratio; a 1350px-tall tile gives you the 4:5 frame, a 1080px-tall tile gives you square.
The steps look like this:
- Create your artwork on one wide canvas so the composition reads as a whole.
- Divide the total width by 1080 to decide how many slides you will produce, and keep the height consistent.
- Slice the canvas into equal 1080-wide tiles, exporting each as its own file in order.
- Upload the tiles left to right so slide one is the leftmost section.
Because every tile is identical in ratio, the first-slide rule works in your favor and nothing gets cropped at the seams. Keep important detail, faces, and text away from the exact slice lines, since a small gap appears between slides as you swipe and anything sitting on a boundary can look interrupted.
A quick pre-post checklist
Before you publish, run through these to avoid re-exporting later:
- Every slide uses the same aspect ratio, no exceptions.
- Width is 1080 pixels on each slide.
- Height matches your chosen ratio (1350 for 4:5, 1080 for 1:1).
- For panoramas, tiles are in the correct left-to-right order.
- Key content sits away from edges and slice lines.
If you are unsure whether a file will hold up, running it through a free Instagram size checker before uploading takes the guesswork out and flags a mismatched slide before the app crops it for you. A thirty-second check beats discovering the problem after the post is live and the engagement window has already opened.
Frequently asked questions
What is the best aspect ratio for an Instagram carousel?
For most creators, 4:5 portrait at 1080 x 1350 pixels is the strongest choice because it fills the most vertical space in the feed. If you prefer a cleaner, grid-friendly look, 1:1 square at 1080 x 1080 also works well. The important part is using the same ratio on every slide.
Why does Instagram crop only some of my carousel slides?
The carousel locks to the aspect ratio of the first slide, and any slide with different proportions gets squeezed into that frame. Slides that already match the first one look fine, while the mismatched ones are cropped. Making every slide the same ratio removes the problem entirely.
Can I mix portrait and square images in one carousel?
You can upload them, but Instagram will crop them to fit the first slide's ratio, so it is not recommended. If you need both formats, either standardize everything to one ratio or add padding to the odd images so they fill the shared frame without losing content.
How do I make a seamless panorama across multiple slides?
Design on one wide canvas, then slice it into equal tiles that are each 1080 pixels wide, keeping the height the same. A three-slide panorama needs a source image about 3240 pixels wide. Upload the tiles in order from left to right so the image flows correctly as viewers swipe.
What pixel width should I export carousel images at?
Export each slide at 1080 pixels wide. Instagram displays feed images at around that width, so 1080px gives the app clean pixels and helps avoid extra compression. Match the height to your ratio, such as 1350 pixels for a 4:5 portrait slide.