and dimensions for 20261080 × 1350 (4:5) works everywhere, schedulers included. Posting from the app, 1080 × 1440 (3:4) fills the new profile grid. Stories and Reels are 1080 × 1920.
Checked on against 8 sources.
Instagram's app takes photos from 1.91:1 landscape to 3:4 portrait and stores them at up to 1,080 px wide. That makes 1080 × 1440 the tallest post you can share from the app, and the only common size the new 3:4 profile grid shows uncropped.
Schedulers, OmniSocials included, publish through Meta's API, which stops at 4:5. So 1080 × 1350 is the safe default: it fits everywhere and loses only a thin strip on each side of the grid. Stories and Reels are 1080 × 1920 (9:16).
Instagram started to accept 3:4 photos in single posts and carousels, the shape most phone cameras shoot. 1080 × 1440 became the tallest feed post. Source
The square profile grid became tall rectangles. Third parties measure the tile at 3:4, so square and 4:5 posts lose their sides on the grid. Source
It works in the app and through every scheduler, and the grid trims only about 34 px from each side.
The tallest post takes the most screen and shows whole on the grid. The API cannot publish it, so post it from the app.
The grid shows the center 3:4 of every post. Keep faces and text inside it on square and 4:5 posts.
Instagram stores photos at up to 1,080 px wide. Wider ones are sized down, and under 320 px they are enlarged.
Every slide takes the orientation you pick. Through the API, all images are cropped to the first one's shape.
The caption and buttons cover the bottom of a Reel. Meta's Reels ad guide keeps the top 14% and bottom 35% clear.
Every size on this page comes from Instagram's Help Center or Meta's content publishing reference, read on October 17, 2026. Where Instagram publishes no number (the profile photo, the grid tile), the page says so and labels the commonly used figure. Grid crop math assumes the 3:4 tile third parties measure.
