Social Media Image Size Guide
See the right aspect ratios and pixel sizes for social posts, stories and video across platforms.
The shapes each platform wants
Every platform and format has a preferred aspect ratio — square, portrait, story, landscape — and posting the wrong shape means awkward cropping or ugly bars. This is a guide to the ratios and pixel sizes for posts, stories and video across the networks, so your content fits the frame it lands in.
Find the platform and format to see the right size.
Why vertical won
The big shift worth understanding is that mobile made vertical formats dominant — stories, reels and short video are all tall because phones are held upright, and vertical fills the screen where landscape leaves it half empty. That is why a 9:16 vertical frame is now the workhorse for so much content. Square still suits feed posts, and landscape survives for long-form video. Designing to the right ratio from the start, rather than cropping later, keeps your subject where it should be and avoids the platform making the cropping decision for you.
Common questions
What aspect ratio should stories and reels be?
Vertical 9:16, which fills a phone screen held upright — the format short-form video and stories are built around.
Why does posting the wrong ratio look bad?
The platform crops or adds bars to fit its frame, often cutting your subject. Designing to the right ratio keeps control of the composition.
Is anything uploaded?
No. It is a reference that runs in your browser.