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What aspect ratio should I use for Instagram posts?

Use 4:5 portrait, 1080 x 1350 pixels, for most feed posts: it fills the most screen of the classic feed shapes. Instagram's Help Center lists feed photos from 1.91:1 landscape to 4:5 portrait at up to 1080 pixels wide, and crops other shapes to fit.

Instagram's Help Center says photos shared at a width between 320 and 1080 pixels keep their resolution if the ratio is between 1.91:1 and 4:5, wider photos are sized down to 1080 pixels, and unsupported ratios are cropped.

For ads in the Instagram feed, Meta's Ads Guide recommends 4:5 at 1440 x 1800 pixels.

Check the crop preview in the app before you post, and keep the subject away from the top and bottom edges so a slightly different crop doesn't cut it.

Sources: Instagram Help Center, photo resolution; Meta Ads Guide, Instagram Feed image ads; both checked October 20, 2026.

Next step

What aspect ratio do Instagram Stories and Reels use?The full-screen formats.Read more

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Last reviewed October 20, 2026 by ImageQuarry

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