Instagram Size Post : The Complete Dimensions Guide for 2026

Knowing the right Instagram size post saves you from blurry uploads, awkward crops, and content that just looks off.

Here are the recommended dimensions for every post type on Instagram in 2026.

Quick Reference — All Instagram Size Post  at a Glance

Understanding Aspect Ratio and Pixels

Before diving into each format, it helps to understand what these numbers actually mean because Instagram uses both terms constantly.

What Is an Aspect Ratio?

An aspect ratio describes the shape of an image specifically the relationship between its width and height, written as width:height.

• 1:1 means equal width and height — a perfect square.
• 4:5 is taller than it is wide — a vertical or portrait shape.
• 9:16 is much taller than wide — the full-screen vertical format used in Stories and Reels.
• 1.91:1 is wider than it is tall — a horizontal or landscape shape.

What Are Pixels and Why Do They Matter?

Pixels are the individual dots that make up a digital image. More pixels means more detail and a sharper image. Instagram has minimum and recommended pixel dimensions for each format uploading below those minimums results in visible blurring or compression artifacts.

In practice, content creators commonly find that uploading at exactly the recommended dimensions (not smaller) keeps images consistently sharp across devices.

Accepted File Formats on Instagram

Instagram Feed Post Size

Feed posts are what most people think of when they search for Instagram post size. Instagram supports three orientations, each with its own dimensions.

For brands managing a broader digital content strategy, getting feed dimensions right is one of the most fundamental steps.

Square Post — 1080 x 1080px (1:1)

The original Instagram format. Still a reliable choice for product photos, centered compositions, text graphics, and anything where equal framing works well. It sits cleanly in the grid without any extra cropping complexity.

Portrait Post — 1080 x 1350px (4:5)

This is Instagram's recommended format for feed posts. Portrait orientation takes up more vertical space in the feed as users scroll, which generally means more visibility before someone moves on.

It works well for full-frame subjects people, tall architecture, fashion and for shots where showing scale matters.

Instagram introduced portrait support after acknowledging that nearly one in five uploaded photos didn't fit the square format, as reported by Fortune.

Landscape Post — 1080 x 566px (1.91:1)

Wide-angle and panoramic content fits naturally here. Scenic photography, group shots, and anything where horizontal framing tells the story better than a crop would.

What's worth noting is that landscape posts take up less feed real estate than portrait ones a trade-off to consider if reach is a priority.

How the Profile Grid Crops Your Posts

What's often overlooked is the profile grid behavior. Instagram's profile grid now previews posts in a 3:4 aspect ratio not 1:1 as it used to.

This means if you upload a 4:5 portrait post, the grid preview may cut off a small portion at the top and bottom. Keep your most important visual content centered to ensure it stays visible in the grid view.

Instagram Carousel Post Size

Carousels let you post multiple images or videos in a single swipeable post. The sizing logic is a little less straightforward than single-image posts.

How Instagram Determines Carousel Dimensions

Instagram takes its sizing cue from the first image or video in your carousel. Whatever dimensions that first card uses, Instagram applies the same frame to everything that follows.

Mixed Dimensions in a Carousel — What Actually Happens

If you choose the "mixed" option when uploading, Instagram doesn't crop uniformly. It adds empty spacing above and below landscape and square images to maintain consistent framing, while portrait images display at 4:5.

The result can feel inconsistent some cards look padded, others look full.The cleaner approach: crop all images to the same dimensions before uploading. That keeps the carousel visually consistent and removes any guesswork.

Video in a Carousel

This one catches people off guard. If you include a video anywhere in a carousel, Instagram switches the entire carousel to portrait dimensions even if your first image was square or landscape. Plan accordingly if you're mixing photos and videos in one post.

Instagram Stories Size

Stories are built for full-screen vertical viewing. The ideal size is 1080 x 1920 pixels at a 9:16 aspect ratio.

How creators use this vertical canvas has evolved rapidly, shaped in large part by how digital women are transforming online culture and setting new norms for visual storytelling on social platforms.

Safe Zone Guidance

What most people don't account for is the interface overlay. Instagram places UI elements profile name, reply bar, close button at the top and bottom of every story.

Keep roughly 250 pixels clear at both the top and bottom of your canvas when placing text, logos, or calls to action. Anything placed in those zones risks being obscured.

Uploading Square or Landscape Images to Stories

If you upload a non-vertical image to Stories, Instagram places it in the center with empty space above and below.

Rather than leaving that space blank, treat it as a design area add text, stickers, background color, or GIFs to fill it out.

In practice, this approach often performs better than a plain letterboxed image because it gives viewers more to engage with.

Story Highlights

Highlight covers display on your profile as circles. They follow the same 1080 x 1920px canvas, but since only the center of the image is visible in the circular crop, keep your thumbnail subject within the safe center area.

Instagram Reels Size

All video posts on Instagram are published as Reels. The recommended size is 1080 x 1920 pixels at a 9:16 aspect ratio the same as Stories.

How Reels Appear Across Different Placements

Reels don't look the same everywhere on Instagram. Here's how the same video appears in different contexts:

This means a video that looks great full-screen may show an unexpected crop in the grid. Shoot with the center of your frame as the focal point to stay safe across all placements.

Reels Cover Photo Size

The Reels cover image what viewers see as a thumbnail should be 1080 x 1920px, the same as the video itself.

You can either select a frame from the video or upload a separate cover image from your camera roll. Cover images are editable even after a Reel is already published.

Reels Video Length and File Size

Reels can currently be up to 90 seconds long for most accounts, with some accounts having access to longer durations, as reported by TechCrunch when Meta announced the expansion from the previous 60-second limit. Maximum file size is 4 GB.

Instagram Profile Photo Size

Your profile photo appears in many places: your profile page, the stories tray, comment sections, and DMs.

Recommended Upload Size

Upload at 320 x 320 pixels with a 1:1 (square) aspect ratio. Instagram displays it as a circle everywhere on the app, so corners get cropped automatically.

Keep your subject centered and leave some margin around the edges to avoid anything important being cut off.

Instagram Ad Sizes — A Brief Overview

Instagram ad sizes are not the same as regular post dimensions. When you boost an existing post, it keeps its original dimensions.

But when you create a dedicated ad one that only your target audience sees, not your main feed Instagram has its own specifications.

Brands that also advertise on platforms like FeedBuzzard will find that cross-platform ad sizing follows similar vertical-first logic.

Common Instagram Ad Dimensions

• Single image or video story ad: 1080 x 1920px
• Carousel story ads: 1080 x 1920px per card (up to 10 cards)

For the full current list of ad file types, aspect ratios, and resolution requirements, Meta's official ads guide is the authoritative source.

Ad specifications are updated periodically and differ slightly from organic post requirements.

What Happens If You Use the Wrong Instagram Post Size?

This is a question competitors don't directly answer but it's worth addressing plainly.

Instagram's Automatic Cropping Behavior

If you upload an image outside Instagram's supported aspect ratio range (between 1.91:1 and 4:5 for feed posts), Instagram automatically crops it to fit within that range.

You don't always get a warning. The crop happens silently, and you may only notice once the post is live.

How Wrong Dimensions Affect Your Content

• Feed posts: Off-ratio images get center-cropped, potentially cutting subjects or text
• Grid preview: Even correctly sized posts can appear differently in the 3:4 grid view if key content isn't centered
• Stories and Reels: Uploading horizontal content results in letterboxing with empty top/bottom space

Minimising Quality Loss from Compression

Instagram compresses images on upload. To reduce visible quality loss, upload at the recommended pixel dimensions rather than smaller sizes, and use JPG files at high quality (around 80–90%).

Uploading significantly larger images doesn't necessarily improve the final result Instagram still compresses the output.

Conclusion

For most feed posts, 1080 x 1350px (4:5) is Instagram's recommended size. Stories and Reels both use 1080 x 1920px.

Profile photos work best at 320 x 320px. Keep key content centered to stay safe across the grid's 3:4 preview crop.

Also Read: Growthscribe Marketing Agency

Frequently Asked Questions

What is the standard Instagram post size?

The standard Instagram post size is 1080 x 1080px for square posts. Instagram also supports portrait (1080 x 1350px) and landscape (1080 x 566px) orientations. Portrait is Instagram's currently recommended feed format.

What size should Instagram Stories be?

Instagram Stories should be 1080 x 1920 pixels at a 9:16 aspect ratio. Leave 250px of clear space at the top and bottom to avoid UI elements overlapping your content.

What are the correct dimensions for Instagram Reels?

Instagram Reels should be 1080 x 1920 pixels (9:16 aspect ratio). Use the same dimensions for your Reels cover photo to keep the thumbnail consistent across the profile grid and the Reels tab.

Why does my Instagram post look different on my profile grid?

Instagram's profile grid now crops post previews to a 3:4 ratio, regardless of your original upload dimensions. Keep important visual content in the center of your image to avoid unexpected cropping in the grid view.

What file formats does Instagram accept?

Instagram accepts JPG, PNG, BMP, and non-animated GIF files for photos. For videos, MP4 and MOV formats are supported.