Social media image and video sizes
Every size, ratio and limit for nine networks, checked against each network's own guidance in September 2026. Pick a network to see its specs.
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Images
- Square post1080 × 1080
- Portrait postTallest feed ratio (4:5)1080 × 1350
- Landscape postWidest feed ratio (1.91:1)1080 × 566
- Story1080 × 1920
Video
- Reel3 s to 15 min via the API, MP4 or MOV, up to 300 MB1080 × 1920
- Story video3–60 s, up to 100 MB (API)1080 × 1920
Limits
- Up to 20 photos or videos per carousel in the app (10 via the API)
- API images: JPEG only, up to 8 MB, 320–1440 px wide
- Feed aspect ratios between 1.91:1 and 4:5
From Instagram's own guidance: Instagram image sizes, Instagram API media. Checked September 2026.
One vertical video, everywhere
The shortcut most creators use.
Frequently asked questions
What's the best image size for Instagram posts?
1080 × 1350 (4:5 portrait) takes up the most space in the feed. Square 1080 × 1080 and landscape 1080 × 566 also work; anything between 1.91:1 and 4:5 is accepted.
What size should vertical videos be?
1080 × 1920 (9:16) works for TikTok, Instagram Reels and Stories, YouTube Shorts, Facebook Reels and Threads. Make one vertical master and reuse it everywhere.
What's the YouTube thumbnail size?
16:9, at least 1280 × 720. YouTube now accepts up to 3840 × 2160; the file limit is 2 MB from a phone and 50 MB from a computer.
How long can Bluesky videos be?
Up to 10 minutes and 300 MB, since Bluesky raised the limit in August 2026. Many size guides still say 3 minutes.
Why does my scheduler reject a video the app accepts?
Networks often set different limits for their own apps and for their APIs, which is what schedulers use. Instagram carousels, for example, allow 20 items in the app but 10 through the API.
Ready to get started?
Upload a video once and schedule it to TikTok, YouTube and more, with a caption for each network.
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