Instagram Post Size: 1080 x 1350
The best-performing Instagram feed post is 1080 x 1350 pixels (4:5 portrait), because it takes up the most vertical space in the mobile feed. Square posts are 1080 x 1080 (1:1), and to match the newer 3:4 profile grid exactly you can upload at 1080 x 1440. Drop an image below and crop it to 1080 x 1350 in your browser - nothing is uploaded.
1080 x 1350 pxRatio4:5PlatformInstagramWhy 1080 x 1350 (4:5)?
Vertical 4:5 posts occupy more of the phone screen than square or landscape, which lifts engagement. The catch is that the profile grid now previews posts at 3:4, so a 4:5 image is cropped slightly top and bottom in the grid.
Common mistake: The common mistake is placing text or a logo near the very top or bottom of a 4:5 post - the 3:4 grid preview crops those edges off. Keep key elements centered, or upload natively at 1080x1440 (3:4) so the grid shows the whole image.
Frequently Asked Questions
1080 x 1350 pixels (4:5 portrait) performs best because it fills the most vertical feed space. 1080 x 1080 (square) is the safe classic, and 1080 x 1440 (3:4) matches the new profile grid with no cropping.
The profile grid now previews posts at a 3:4 ratio, so 1:1 and 4:5 posts get cropped in the grid view. Keep faces and text centered, or upload at 1080x1440 (3:4) to match the grid exactly.