01Instagram post sizes in 2026
Every feed format shares one width, 1080 px, and differs only in height. The table lists the size Instagram displays for each ratio, which is also the size the Aspect Ratio Cropper exports.
| Format | Ratio | Size (px) | Used for |
|---|---|---|---|
| Square | 1:1 | 1080 × 1080 | Feed posts and carousels |
| Portrait | 4:5 | 1080 × 1350 | Feed posts; the tallest standard portrait |
| Portrait | 3:4 | 1080 × 1440 | Feed posts that match the profile grid |
| Story/Reel | 9:16 | 1080 × 1920 | Stories and Reels |
| Landscape | 1.91:1 | 1080 × 566 | Landscape feed posts |
Instagram scales larger uploads down to these sizes, so a bigger file shows no more detail in the feed.
02Which ratio should you use?
For a single photo in the feed, 4:5 wins: it is a quarter taller than a square at the same width, so it fills more of the screen as people scroll. The other ratios each have a job.
- 4:5 portrait (1080 × 1350): the default for feed photos and most carousels.
- 3:4 portrait (1080 × 1440): matches the profile grid's 3:4 thumbnails, so nothing is trimmed on your profile.
- 1:1 square (1080 × 1080): carousels that mix orientations, and product grids that need a neutral frame.
- 1.91:1 landscape (1080 × 566): wide scenes; it takes the least feed space, so use it only when the image needs it.
- 9:16 (1080 × 1920): Stories and Reels, where the whole screen is yours.
Not sure how a crop will look next to the caption? The Post Preview shows the post as the feed renders it, in light and dark mode.
03Why 1080 px wide?
Instagram re-encodes every upload and scales it to its display width. If you upload a 3240 px photo, the app resizes it for you with its own settings; if you export at 1080 px yourself, you choose the resize and the sharpening, and the app only has to compress.
04Check the crop and caption before you post
A size is only half of it: the feed also folds your caption after about two lines. Drop the cropped photo into the Post Preview to see the crop, the handle and where “… more” cuts in, then publish from the Instagram app.
Open the Post PreviewSee your photo and caption as a feed post, with the two-line fold, before you publish.Instagram post size FAQ
1080 × 1350 px. Instagram displays feed photos 1080 px wide and scales larger uploads down to that width, so exporting at 1080 × 1350 gives you control of the resize without losing anything.
Crop to 4:5For a single photo, yes: 4:5 is the tallest standard feed ratio, so it takes the most screen space. Instagram also accepts 3:4 (1080 × 1440), which matches the profile grid exactly; pick that when the profile view matters more than the feed.
Instagram crops it to the tallest ratio it allows when you upload, and you only get to slide the crop up and down. Cropping to 4:5 or 3:4 yourself first means you decide what stays in frame.
1080 × 1920 px (9:16), the full phone screen. Keep text away from the edges, because the app's own buttons and caption cover parts of the frame.
Use JPG or PNG; both upload everywhere, and Instagram re-encodes the file anyway. WebP is smaller but some Instagram upload paths refuse it, so keep it for the web, not the app.