What size are Instagram posts?

1080×1080 px for square feed posts.

What about portrait posts?

4:5 (1080×1350) is supported in feed; check Instagram's latest creator docs.

JPG for photos; PNG only when you need transparency in graphics.

spec · image

Instagram feed post size is 1080×1080 px square. Story and Reels use different ratios.

Updated 2026-05-21

Asset	Size	Max file	Formats
feed_post	1080×1080	30720 KB	jpg, png
story	1080×1920	30720 KB	jpg, png

Square 1:1 recommended; carousel uses same dimensions.

What size are Instagram posts?: 1080×1080 px for square feed posts.
What about portrait posts?: 4:5 (1080×1350) is supported in feed; check Instagram's latest creator docs.
Best format for Instagram?: JPG for photos; PNG only when you need transparency in graphics.