The Instagram Landscape Post size (1080×566px)
The 1.91:1 landscape at 1080x566 pixels is the widest horizontal image Instagram will show in the feed without cropping. It suits panoramas, group shots, product lineups, and any scene that reads better wide than tall, and it matches the same ratio used for link previews across social platforms.
Landscape posts take up the least vertical space of any feed format, so they scroll past quickly. Because of that, they work best when the wide framing is genuinely the point of the shot rather than a way to fit a horizontal photo you did not want to crop. If height is available, portrait usually outperforms landscape for engagement.
Like every feed format, the profile grid crops this wide image to a square, cutting the left and right edges hard. That is the main pitfall: a subject placed on one side of a landscape photo can vanish entirely in the grid thumbnail. Keep the hero of the image centered horizontally, and treat the far left and right as expendable margins that only appear in the full feed view.