Instagram portrait post size
1080 × 1350pixels · 4:5
Official sources disagree on the tallest portrait size. The Instagram Help Center now allows posts up to 3:4 (1080 × 1440) when you upload in the app, but the publishing API that scheduling tools use, and Meta’s ad guide, stop at 4:5 (1080 × 1350). 4:5 is accepted everywhere, so it’s the safe choice; use 3:4 only if you post from the app.
Checked November 14, 2026
Crop your image to 1080 × 1350
Instagram portrait post specs
- Recommended size
- 1080 × 1350 px
- Aspect ratio
- 4:5
- Also used
- 1080 × 1440 px (3:4 (app uploads only))
- Minimum size
- 320 px wide
- Maximum file size
- Not stated for in-app posting. 8 MB via Content Publishing API. 30 MB for feed ads.
- Formats
- JPEG (API), JPG, PNG (ads)
- Safe zone
- A 4:5 post is slightly cropped top and bottom on the 3:4 profile grid (secondary: Hootsuite, Buffer). Keep key content centered.
Sources
Sources disagree on this one, or the platform doesn’t publish a number. The size above is the safest choice we found; see the summary for details.
- officialfacebook.com/help/instagram/1631821640426723
- officialdevelopers.facebook.com/docs/instagram-platform/instagram-graph-api/reference/ig-user/media
- officialfacebook.com/business/ads-guide/update/image/instagram-feed
- secondaryblog.hootsuite.com/social-media-image-sizes-guide/
- secondarysproutsocial.com/insights/social-media-image-sizes-guide/
- secondarybuffer.com/resources/social-media-image-sizes/
Platforms change these often. If something looks out of date, let us know at hello@edits.io.
Frequently asked questions
What size is a Instagram portrait post?+
1080 × 1350 pixels, an aspect ratio of 4:5. 1080 × 1440 (3:4 (app uploads only)) also works.
What is the maximum file size for a Instagram portrait post?+
Not stated for in-app posting. 8 MB via Content Publishing API. 30 MB for feed ads.
How do I resize an image to 1080 × 1350?+
Drop your image into the tool on this page, drag and zoom to choose the crop, and download it at exactly 1080 × 1350. It runs in your browser, so the image isn’t uploaded.
Where do these numbers come from?+
From Instagram’s own documentation and widely used design guides. We checked them on November 14, 2026; the sources are listed on this page.
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