Instagram Post Size (2026): Best Dimensions

The best Instagram post size is 1080 x 1350 pixels, a 4:5 portrait shape, because it is the tallest image the feed allows and therefore takes up the most screen space as someone scrolls. Instagram also supports a square at 1080 x 1080 and a landscape at 1080 x 566, and it renders all feed images at 1080 pixels wide. So the practical answer is: build at 1080 pixels on the width, choose portrait when you want maximum impact, and only drop to square or landscape when the composition genuinely calls for it.

The three feed sizes at a glance

Every standard Instagram photo post falls into one of three shapes. Seeing them together makes the trade-offs obvious.

Notice that the width is always 1080 pixels; only the height changes. That is because Instagram fits images to the column width and lets height vary within the allowed range. Taller means more of the screen is yours, which is the entire reason portrait is the recommended default.

Why 1080×1350 portrait is the strongest choice

A feed is a vertical scroll. The more vertical space a single post occupies, the longer it stays in view before the next post appears, and the more likely a viewer is to stop on it. At 1080×1350, the 4:5 portrait is the tallest the feed permits, so it simply commands more attention than a square or a short landscape image. For photography, product shots, quotes, and most single-image posts, portrait is the format that gives your work room to breathe. This is why our broader aspect ratio for Instagram guide treats 4:5 as the feed default and the pillar for planning.

Portrait is not always the answer. A truly square composition, or a set of carousel slides you want to feel uniform, can look better at 1:1. And a sweeping landscape may demand the 1.91:1 frame despite its smaller footprint. The point is to choose deliberately rather than defaulting to whatever your camera produced.

It is also worth planning for how the post looks months later. A feed is not only a stream; it is an archive people scroll back through and a grid new visitors scan when they land on your profile. A post sized and cropped with care still reads well when someone revisits it, while a hastily cropped image that lost its subject to an awkward trim keeps looking wrong every time it reappears. Spending a moment to crop to 1080×1350, 1080×1080, or 1080×566 before you publish is a small investment that pays back across the entire life of the post.

Resolution versus aspect ratio

Keep two concepts distinct. The aspect ratio is the shape, such as 4:5. The resolution is how many pixels fill it, such as 1080×1350. Instagram displays feed images at 1080 pixels wide, so exporting at that width keeps detail intact. If you export narrower, say 640 pixels, Instagram upscales the image to fit, which softens edges and text. Exporting much wider than 1080 is usually pointless for the feed, since the app downsizes it anyway, though a slightly larger master gives you cropping room. To verify any dimensions match a target ratio before you export, our aspect ratio calculator handles it instantly, and the image resizer will reshape a photo to the exact size you need.

Setting the right size before you post

The cleanest workflow is to crop to the final shape before uploading rather than relying on Instagram’s in-app crop, which can trim in ways you did not intend. In an editor, set the canvas to 1080×1350 for portrait, 1080×1080 for square, or 1080×566 for landscape, and compose within it. If you are starting from a photo of a different shape, resize and crop it to one of these targets first so you control exactly what is kept and what is cut.

When you do crop inside the Instagram app, use the pinch gesture on the upload screen to fit the whole image, but be aware that forcing an unusual shape into the feed can still letterbox it. Preparing the file at the correct size beforehand avoids that entirely.

The profile grid crop

Your profile grid is separate from the feed, and Instagram previews posts there using a center crop. The height of that grid preview has changed over time, shifting from a square toward a taller rectangle, and it may change again. Rather than chase the exact crop, follow one durable rule: keep the most important part of each image, usually a face, product, or headline, near the center of the frame. A centered subject survives whatever crop the grid applies, so your profile looks intentional even as Instagram adjusts the preview. Portrait 4:5 images generally sit well in the grid, which is another reason to favor them.

File format, quality, and compression

Export photos as high-quality JPG or PNG at the correct pixel dimensions. JPG at high quality is fine for most photographs and keeps file sizes manageable; PNG suits graphics with flat color and crisp text. Instagram re-compresses uploads, so start with a clean, sharp source: the better your input, the better the compressed result. Keep the file size sensible so the upload completes smoothly, but never reduce the resolution below 1080 pixels wide to save space, that is the fastest route to a soft, disappointing post.

If your posts consistently look grainy or soft after uploading, the cause is nearly always a too-small export or heavy in-app compression rather than Instagram degrading a good file for no reason. Uploading on a stable connection and exporting at full resolution resolves most cases.

Carousel posts and keeping slides consistent

Many of the best-performing feed posts are carousels, the swipeable sets of up to several images. They follow the same size rules as single posts, with one important habit: keep every slide the same shape. Instagram has traditionally displayed a carousel using the aspect ratio of its first slide, so a square opener can force later portrait slides to be cropped. Even as the platform relaxes some of these constraints, the dependable approach is to build all slides on one canvas, usually 1080×1350 portrait or 1080×1080 square, so nothing is trimmed unexpectedly as the viewer swipes.

Consistency also pays off visually. When your carousels and single posts share a ratio, your profile grid looks deliberate rather than patchy. Choosing one house size, portrait 4:5 is a strong default, and sticking to it is one of the simplest ways to make an account look professionally run. Prepare each slide at the exact pixel dimensions before uploading, and the whole set will display cleanly without any in-app cropping surprises.

How post size relates to Instagram’s other formats

Feed posts are only one part of Instagram. The full-screen formats are a different shape entirely: Reels and Stories are 9:16 at 1080×1920, tall enough to fill a phone screen. If you plan to repurpose a shoot across surfaces, read our guides to Instagram Reels dimensions and the Instagram Story aspect ratio, both of which cover the safe zones those formats require. A good habit is to capture wider and taller than any single target, then crop a 4:5 feed post, a 1:1 carousel slide, and a 9:16 vertical clip from the same material. That keeps your whole profile consistent without reshooting for each surface.

Common mistakes and quick fixes

The most common post-size mistake is uploading whatever shape the camera produced and letting Instagram crop it, which trims heads and text. Crop to 1080×1350, 1080×1080, or 1080×566 yourself first. The second is exporting below 1080 pixels wide, which forces upscaling and softening; always hit 1080 on the width. The third is composing with the subject near an edge, then losing it to the profile-grid crop; center the focal point. And the fourth is defaulting to landscape out of habit, which gives up the vertical space that makes the feed work for you, when in doubt, go portrait.