Resize Photo for Instagram

Both numbers are real; they are different jobs. 1080×1350 is 4:5, the tallest feed-post size Instagram has long shown without cropping the open post. 1080×1440 is 3:4, the tile many profile grids now draw. For a feed post, export 1080×1350 — that is the portrait preset here. Use 1080×1440 only if you care about filling a 3:4 grid tile; the extra height often never appears in the post itself.

Neither is an Instagram post size. 4:3 is what most phone cameras shoot natively, and it sits close to 4:5, so a small crop turns it into a portrait post. 16:9 is TV and YouTube; in the Instagram feed it shows as a short landscape strip with empty space above and below. Shoot 4:3, then crop to 4:5 for the feed or 9:16 for stories and Reels.

Yes, but 1920×1080 is 16:9 landscape — the same shape as a YouTube video, not an Instagram post. The feed will show it small and wide. Crop or pad it to 1080×1350 (portrait), 1080×1080 (square) or 1080×566 (landscape post) first. Do not confuse it with story size, which is 1080×1920, the other way round.

Four units wide by five tall. At Instagram’s 1080 px width that is 1080×1350 pixels, the portrait post size. It is not 5×7 (a print), not 3:4 (1080×1440, a grid tile) and not 9:16 (1080×1920, stories and Reels). A 4:5 post takes more of the phone screen than a square without being cropped when someone opens it.

The profile grid on many accounts now shows taller 3:4 tiles, which is why 1080×1440 keeps coming up. Feed posts are still capped at 4:5 (1080×1350) as the tallest ratio that does not get cropped in the post view. Instagram has not replaced 4:5 with 3:4 as the only post size — 1:1 and 1.91:1 still work too.

4:3. Phone sensors are native 4:3; shooting 16:9 just chops the top and bottom in-camera and throws those pixels away. A 4:3 original can be cropped later to 4:5, 1:1 or 9:16. You cannot get the missing height back from a 16:9 file.