Instagram Post Sizes 2026: Feed, Reels, Stories, Carousel

Upload a photo that is slightly the wrong shape, and Instagram decides what gets cut, not you. The app publishes specific rules for which aspect ratios it keeps untouched and which ones it silently crops, and those rules are stricter than a lot of size charts assume, especially for portrait photos. This guide covers the exact pixel dimensions and ratios for every format, feed photos, Reels, Stories, and carousels, pulled directly from Instagram's own Help Center in September 2026.

If you also manage a Facebook Page, the companion guide to Facebook post sizes for 2026 covers the same ground for that platform, including a September 2025 change to how Facebook handles video that most advertisers have not caught up on yet.

Quick Reference: Instagram Sizes at a Glance

Format	Aspect ratio	Recommended pixels	Length or file notes	Source
Square feed photo	1:1	1080 x 1080	JPG or PNG	Photo resolution
Tallest feed photo	3:4	1080 x 1440	JPG or PNG	Photo resolution
Widest feed photo	1.91:1	1080 x 566	JPG or PNG	Photo resolution
Feed video / Reel	1.91:1 to 9:16	1080 x 1920 at 9:16 (derived)	Record up to 20 min; best reach under 3 min	Reel size, Record a reel
Carousel, 2 to 20 items	One ratio for the whole post: square, 3:4, or 1.91:1	Matches whichever orientation you pick at upload	Up to 20 photos or videos total	Multiple photos or videos
Stories	Not published; full-screen vertical player	About 1080 x 1920 at 9:16 (derived from the Reels range)	Visible for 24 hours	Share to your story
Reel cover photo	1:1.55	420 x 654	PNG or JPG, fixed after upload	Reel size
Profile picture	Square	Not published by Instagram	Displays inside a circular frame in the app	Add a profile picture

Dimensions marked "derived" are not stated as an exact pixel size by Instagram; they are the pixel result of applying a ratio Instagram does state.

Square Feed Photos (1:1)

Instagram's own description of how it handles feed photos is simple: it uploads "at the best quality resolution possible (up to a width of 1080 pixels)," according to the Image resolution help page. A perfectly square photo at 1080 x 1080 pixels is the safest, most predictable format, since it sits in the middle of the supported ratio range and needs no cropping.

Tallest Supported Feed Photo: 3:4, Not 4:5

Most size guides you will find online say Instagram's tallest supported feed ratio is 4:5, which works out to 1080 x 1350 pixels. Instagram's current Help Center page for feed photos says something slightly different. It states that a photo is kept at its original resolution "as long as the photo's aspect ratio is between 1.91:1 and 3:4 (a width of 1080 pixels with a height between 566 and 1440 pixels)." At 1080 pixels wide, a 3:4 ratio works out to 1080 x 1440, taller than the commonly cited 4:5. If your upload is taller than 3:4, Instagram crops it down to fit; it does not reject the upload.

Widest Supported Feed Photo: 1.91:1

At the other end of the same range, 1.91:1 is the widest ratio Instagram keeps untouched, which comes out to 1080 x 566 pixels at full width. This is the same ratio Instagram's Help Center uses as the wide boundary for feed photos, Reels, and, on Facebook's side, link-share previews.

What Instagram Actually Crops, Enlarges, or Shrinks

Per the same photo resolution page, Instagram applies three separate rules depending on what you upload:

• Aspect ratio outside 1.91:1 to 3:4: the photo "will be cropped to fit a supported ratio." You do not get to choose the crop point in advance from a plain upload.
• Width below 320 pixels: Instagram enlarges the photo up to a width of 320 pixels, which usually looks soft.
• Width above 1080 pixels: Instagram sizes the photo down to 1080 pixels wide, so uploading a 4K image gains you nothing.

To guarantee your photo keeps its exact framing, Instagram's own advice is to use the latest app version and upload at least 1080 pixels wide with an aspect ratio between 1.91:1 and 3:4.

Reels: Full-Screen Vertical Video

Instagram's Reel size and aspect ratio page states you can upload a Reel "with an aspect ratio between 1.91:1 and 9:16," with a minimum frame rate of 30 FPS and a minimum resolution of 720 pixels. Nothing on that page states a maximum pixel size, but 9:16 at 1080 x 1920 is the practical target if you want the video to fill the phone screen edge to edge with no letterboxing.

The Reel cover, the still image people see before pressing play, gets its own spec: a recommended size of 420 x 654 pixels (a 1:1.55 ratio), saved as a PNG or JPG. Instagram notes you cannot edit the cover after it has been uploaded, so pick it carefully during the posting flow.

A Single Video Post Is Now a Reel

If you are looking for a separate spec for "regular" Instagram feed video, as opposed to a Reel, you will not find a current one. The Help Center page that answers "how do I post a video" now redirects to Record a reel on Instagram, which states you can "record and edit videos up to 20 minutes with Instagram Reels," while also noting that "Reels over 3 minutes won't be recommended to new audiences." In practice, a single video you share to your main feed goes through the Reels composer and follows the Reels sizing rules above, even if it never appears in the dedicated Reels tab.

Carousels: One Orientation for the Whole Post, Not Per Photo

This is the fact most guides get wrong. Instagram's page on sharing a post with multiple photos or videos states plainly that "the orientation you choose (square, portrait or landscape) affects all of the photos or videos in your post. You can't select a different orientation for each photo or video." You pick one shape at upload, square, 3:4 portrait, or 1.91:1 landscape, and every one of the up-to-20 items in that carousel is cropped to match it.

The same page also notes that videos inside a carousel "are not considered reels and will not show up in the Reels tab or have reels features," so a strong video buried in slide four of a carousel gets none of the discovery a standalone Reel gets.

Stories

Instagram does not publish an exact pixel spec for Stories in the way it does for Reels. The Help Center pages for sharing a photo or video to your story and for editing a story cover the 24-hour visibility window and the in-app editing tools (drawing, text, stickers, music), but neither states an aspect ratio or pixel dimension. Since Stories use the same full-screen vertical player as Reels, the practical target is the Reels range above: 1.91:1 to 9:16, with 1080 x 1920 at 9:16 filling the screen with no cropping.

Profile Picture

Instagram's help page for adding or changing a profile picture walks through the upload steps but does not publish a pixel spec, unlike Facebook, which documents an exact size for Page profile pictures (see the Facebook guide for that number). What you can observe in the app is that your profile picture displays inside a circular frame, so keep your subject centered with margin near the edges of a square image rather than filling every corner.

Safe Zones for Reels and Stories

On both Reels and Stories, Instagram's own interface sits on top of your content: your username and caption usually anchor near the bottom, while following/music details and the progress bar sit near the top. Instagram does not publish exact safe-margin pixels for organic posts the way ad specs sometimes do, so the reliable way to check is visual, not a fixed number pulled from a chart. Run your creative through the Safe Zone Checker before you post to see exactly what the interface would cover on a Reel or Story.

What Changes When You Boost a Post

Instagram's Ways to advertise page confirms you can boost "feed posts, Reels, Stories and partner content directly from the Instagram app," and when you do, "audience and placement options are set automatically." That last part matters for sizing: a boosted post can be delivered into placements beyond the one it was originally shaped for, and full Advantage+ placement control is only available in Meta Ads Manager, not the in-app boost flow. Before boosting anything, check the exact placement-by-placement dimensions on the Meta ad specs hub rather than assuming your organic crop carries over unchanged.

Common Mistakes

• Designing to 4:5 (1080 x 1350) and assuming it is the safe tallest ratio. Instagram's current cap is 3:4 (1080 x 1440); a 4:5 image is comfortably inside that range and displays fine, but it is not the actual limit.
• Mixing a square first slide with portrait interior photos in one carousel. Instagram forces every item in the carousel to the same orientation as the one you picked at upload.
• Assuming Stories or Reels inherit your feed's aspect ratio. Both are vertical, full-screen formats; a square photo gets padded or cropped, not stretched to fit.
• Skipping the cover photo step on a Reel. Leaving it to Instagram's default can grab a mid-motion or unflattering frame instead of the 420 x 654 cover you control.
• Assuming a boosted post displays identically to the organic version. Placement is set automatically and can differ from the single placement your original crop was designed for.

How Adship Keeps Every Placement Sized Right

Matching eight different aspect ratios by hand, then re-checking them every time Instagram adjusts a spec, is not a good use of a founder's or a designer's time. Adship's Canvas generates ad creative already sized for the placement your campaign uses, and the free tools hub includes the Safe Zone Checker above plus the full Meta ad specs hub for the moment a post becomes a paid placement. See what is included on the pricing page.

Frequently Asked Questions

What is the ideal Instagram post size in 2026?

For a single feed photo, 1080 x 1080 pixels (square) is the safest choice because it sits inside Instagram's supported range with no cropping. If you want a taller photo, 1080 x 1440 (3:4) is the tallest ratio Instagram keeps untouched.

Is Instagram's feed photo ratio 4:5 or 3:4?

Instagram's current Help Center page states the supported range as 1.91:1 to 3:4, not 4:5. A 4:5 image (1080 x 1350) still falls inside that range and will not be cropped, but 3:4 (1080 x 1440) is the actual tallest ratio Instagram allows before it crops your photo.

Can I use a different aspect ratio for each photo in a carousel?

No. Instagram's Help Center states that the orientation you choose for a carousel, square, portrait, or landscape, applies to every photo and video in that post. You cannot mix orientations within one carousel.

What size should my Instagram Reels cover photo be?

420 x 654 pixels, a 1:1.55 ratio, saved as a PNG or JPG. Instagram does not let you edit the cover after it has been uploaded, so choose it during the posting flow rather than after publishing.

How long can an Instagram Reel actually be?

You can record and edit up to 20 minutes, per Instagram's Help Center. That page also notes that Reels over 3 minutes will not be recommended to new audiences, so length and reach are two separate limits.

What happens to my image size if I boost a post?

Boosting sets your audience and placement automatically, and your post can be delivered into placements it was not originally sized for. Full control over which placements a paid post uses, and their exact dimensions, requires Meta Ads Manager rather than the in-app boost button.

What is the exact pixel size for an Instagram Story?

Instagram does not publish one. Stories use the same full-screen vertical player as Reels, so the practical target is that Reels range: 1.91:1 to 9:16, with 1080 x 1920 at 9:16 filling the screen edge to edge.

Sources

• Image resolution of photos you share on Instagram, Instagram Help Center, fetched 2026-09-06
• Reel size & aspect ratios on Instagram, Instagram Help Center, fetched 2026-09-06
• Record a reel on Instagram, Instagram Help Center, fetched 2026-09-06
• Share a post with multiple photos or videos on Instagram, Instagram Help Center, fetched 2026-09-06
• Share a photo or video to your Instagram story, Instagram Help Center, fetched 2026-09-06
• Tips for uploading, recording and editing your Instagram story, Instagram Help Center, fetched 2026-09-06
• Add a profile picture or change your current picture on Instagram, Instagram Help Center, fetched 2026-09-06
• Ways to advertise on Instagram, Instagram Help Center, fetched 2026-09-06