Instagram Ratio Size Guide: Every Format and Dimension for 2026
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Instagram Ratio Size Guide-Instagram supports three feed post ratios — 1:1 (square), 4:5 (portrait), and 1.91:1 (landscape). Stories and Reels use a 9:16 ratio. Profile photos sit at 1:1 but display as a circle. Every format is built on a 1080px width baseline.
What Aspect Ratio and Pixels Mean on Instagram
Before getting into the specific numbers, it helps to understand what you're actually looking at when someone says "1080 x 1350" or "4:5."
Aspect Ratio Explained Simply
Aspect ratio is just the shape of your image — specifically, the relationship between its width and height. Written as width:height.A 1:1 ratio is a perfect square. A 4:5 ratio is taller than it is wide — portrait orientation.
A 9:16 ratio is much taller than wide, which is why it fills a phone screen vertically. And 1.91:1 is wider than it is tall, which gives you the classic landscape look.The ratio tells Instagram how to frame the image. Get it wrong and the platform crops it for you — usually in a way you don't want.
Pixels and Resolution — Why They Matter for Image Quality
Pixels are the individual dots that make up a digital image. More pixels means sharper detail. Instagram's recommended dimensions are minimums in practical terms — uploading below them risks visible blurriness, especially on larger phone screens.
Instagram recompresses images on upload. In practice, most creators and social media managers find that uploading at exactly 1080px width gives the cleanest result. Going higher doesn't always improve quality after compression, but going lower almost always hurts it.
Supported File Formats on Instagram
For photos: JPG, PNG, BMP, and non-animated GIF files. For videos: MP4 and MOV files.
Stick to JPG for photos when possible. It compresses more predictably than PNG on Instagram's backend.
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Instagram Ratio and Size by Post Type — Full Reference Table
|
Post Type |
Aspect Ratio |
Pixel Dimensions |
|
Square feed post |
1:1 |
1080 x 1080 px |
|
Portrait feed post |
4:5 |
1080 x 1350 px |
|
Landscape feed post |
1.91:1 |
1080 x 566 px |
|
Profile grid preview |
3:4 |
Crops from original |
|
Instagram Story |
9:16 |
1080 x 1920 px |
|
Instagram Reels |
9:16 |
1080 x 1920 px |
|
Reels cover photo |
9:16 |
1080 x 1920 px |
|
Profile photo |
1:1 |
320 x 320 px |
Instagram Feed Post Size
Square Post — 1:1 Ratio (1080 x 1080 px)
The square format is where Instagram started, and it still holds up well for certain content types product photos with centered subjects, graphics, quote cards, and symmetrical compositions. Nothing gets cropped. Nothing gets awkward.
That said, as reported by Fortune, nearly one-fifth of photos uploaded to Instagram were not in square format even before the platform officially allowed other ratios — which eventually pushed Instagram to expand beyond the square entirely.
Portrait Post — 4:5 Ratio (1080 x 1350 px)
This is the format Instagram recommends for feed posts. At 1080 x 1350 px, a portrait post occupies more vertical space in the feed than a square does. More screen real estate typically means more attention.
It works well for people, tall subjects, editorial-style photography, and text-heavy graphics where you need the extra height.
Landscape Post — 1.91:1 Ratio (1080 x 566 px)
Landscape is the widest format Instagram allows. At 1080 x 566 px, it's noticeably shorter in the feed than square or portrait. That can work against you in terms of scroll-stopping power, but it's the natural choice for wide scenic shots, panoramas, or any image where cropping down would cut something important.
According to TechCrunch, the move to support landscape and portrait formats was specifically driven by user frustration — fashion photographers, in particular, were losing shoes from portrait shots and scenic edges from landscape images because of the enforced square crop.
How Your Feed Post Appears on the Profile Grid
What's often overlooked is that your profile grid does not show images at their posted ratio. The grid previews everything in a 3:4 aspect ratio slightly taller than square.
This means the edges of landscape images get cut off in grid view, and the top or bottom of portrait images may be cropped in the thumbnail.Keep important elements — faces, text, logos centered in your composition. That way the grid preview still makes sense even after the crop.
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Instagram Carousel Post Size
Carousels follow the dimensions of the first image in the sequence. Whatever ratio that first image is — square, portrait, or landscape — Instagram applies it to the rest.
How Instagram Handles Mixed Image Sizes in a Carousel
If you select the "mixed" option, Instagram adds padding above and below landscape and square images while keeping portrait images at 4:5. It's not always clean. In practice, most teams find it easier to crop all carousel images to the same ratio before uploading rather than relying on Instagram to handle the mix.
One more thing: if Instagram auto-crops your carousel images, you cannot adjust that crop after upload. You lose that control permanently.
What Happens When You Include a Video in a Carousel
Adding a video to a carousel changes the rules. Instagram switches the entire carousel to portrait dimensions regardless of what the first photo is. If you're mixing photos and videos in a carousel, design everything in portrait from the start.
Instagram Story Size and Ratio
Recommended Dimensions — 1080 x 1920 px, 9:16
Stories are built for full-screen vertical viewing. The recommended size is 1080 x 1920 px at a 9:16 ratio. At these dimensions, your story fills the phone screen edge to edge with no borders or letterboxing.
If you upload a square or landscape image into a story, Instagram will either add blurred background fill or leave black bars on either side. Neither looks as polished as a properly sized vertical image.
Safe Zone — Where to Keep Text and Key Visuals
Instagram overlays your profile information and interactive buttons at the top and bottom of every story. Roughly 250 pixels at the top and bottom of a 1920px-tall canvas should be kept clear of important content — text, logos, call-to-action copy.
Interestingly, this is a detail most guides skip entirely. Place key content in the middle 1,400 px of the canvas and you avoid any overlap with the UI.
Instagram Reels Size and Ratio
Recommended Dimensions — 1080 x 1920 px, 9:16
Reels use the same dimensions as Stories — 1080 x 1920 px at 9:16. The full vertical video plays when someone taps on it in the feed or finds it on the Explore page.On your profile grid, Reels thumbnails appear in a 3:4 ratio alongside your photos. Under the dedicated Reels tab, thumbnails display at the full 9:16 ratio.
Reels Cover Photo and How It Appears on the Grid
The cover photo for a Reel is what shows on your profile grid. You can either pull a frame directly from the video or upload a separate image from your camera roll. Either way, size it at 1080 x 1920 px — the same as the video itself.
Updating a Reels Cover After Publishing
You are not locked in after posting. You can go back to any published Reel, tap the menu in the top right, select Edit Cover, and choose a new frame or upload a fresh image. Useful if you want to maintain a consistent visual grid without re-posting the video.
Instagram Profile Photo Size
Dimensions and Circle Crop Behavior
Upload your profile photo at 320 x 320 px at a 1:1 ratio. Instagram displays it as a circle everywhere on the platform — your profile page, the stories tray, comment sections, DMs.
Anything close to the corners of that square gets clipped.
Keep your subject — face, logo, icon centered with some breathing room around the edges. A tight crop that works in a square preview often looks wrong once the circle mask is applied.
Instagram Ads Size — How It Differs from Organic Posts
Instagram ad sizes are not identical to organic post sizes, though there is significant overlap. Single image and video story ads typically follow the 1080 x 1920 px standard. Carousel story ads use the same dimensions across each card.
The meaningful difference is that ads go through Meta's own specifications, which include additional requirements around file size, file type, and aspect ratio tolerances depending on the placement. For ad campaigns, refer to Meta's ads guide directly rather than relying on organic post specs.
Conclusion
Instagram ratio size varies by format — 1:1, 4:5, or 1.91:1 for feed posts; 9:16 for Stories and Reels; and 1:1 for profile photos displayed as a circle. Keep key content centered for the 3:4 grid crop, and leave safe zones clear in Stories.
Frequently Asked Questions
What is the best Instagram post ratio for the feed?
Instagram recommends 4:5 (portrait) for feed posts. At 1080 x 1350 px, it takes up more vertical screen space than square, which generally helps with visibility as someone scrolls.
What size is an Instagram Story?
The correct size for an Instagram Story is 1080 x 1920 px at a 9:16 aspect ratio. This fills the screen fully without any borders or background fill.
What size should Instagram Reels be?
Reels should be 1080 x 1920 px at a 9:16 ratio — the same as Stories. Use the same dimensions for your Reels cover photo to keep the grid thumbnail clean.
Is the Instagram grid 4:5 or 3:4?
The profile grid previews content in a 3:4 ratio regardless of what ratio you posted at. Your actual post stays at its original dimensions — only the grid thumbnail is cropped to 3:4.
How do I post a full image on Instagram without cropping?
Upload your image at one of Instagram's accepted ratios — 1:1, 4:5, or 1.91:1. If your original image has different proportions, use a tool like Canva to add borders or padding before uploading rather than letting Instagram crop it automatically.
