Video Sizes for Social Media: Aspect Ratios and Lengths
Post a video in the wrong size and it gets cropped, letterboxed, or buried — no matter how good the content is. Each platform favors specific aspect ratios and lengths, and matching them is one of the easiest wins in content creation.
This guide is a plain-English reference for the video sizes that matter across the major platforms. Bookmark it, and you will never have to guess whether your next video should be square, vertical, or wide.
First, a quick primer on the terms, then platform-by-platform specifics.
Aspect ratios and resolution, explained
Aspect ratio is the shape of your video — the relationship between width and height. The three you will use most are 9:16 (tall vertical), 1:1 (square), and 16:9 (wide horizontal).
Resolution is the pixel count. 1080p (1920x1080) is the practical standard for social video; higher resolutions like 4K give you room to crop and future-proof your footage but create larger files.
- 9:16 vertical (1080x1920): built for phones held upright — Shorts, TikTok, Reels, Stories.
- 1:1 square (1080x1080): compact in feeds, works across most platforms.
- 16:9 horizontal (1920x1080): the classic widescreen shape for YouTube and desktop viewing.
- Shoot or generate in the highest resolution you can, then export to what each platform needs.
YouTube (long-form)
Standard YouTube videos are horizontal at 16:9, ideally exported at 1920x1080 or higher. The player is built around this shape, so vertical uploads leave black bars on the sides.
Length is flexible. YouTube rewards watch time, so make the video as long as it stays interesting and no longer. Many explainers and tutorials land comfortably between six and fifteen minutes.
- Aspect ratio: 16:9 horizontal.
- Resolution: 1920x1080 (1080p) or 3840x2160 (4K).
- Length: no strict limit; match it to the topic and audience intent.
YouTube Shorts
Shorts are vertical, 9:16, and capped at a short duration. They live in a separate feed designed for quick, swipeable viewing, so treat them like their own format rather than trimmed long-form videos.
- Aspect ratio: 9:16 vertical (1080x1920).
- Length: up to about 60 seconds.
- Keep key text away from the edges so buttons and captions do not cover it.
TikTok
TikTok is vertical-first at 9:16 and fills the whole screen. Design for a full-bleed vertical frame, and keep important visuals and text centered so interface buttons on the right and bottom do not block them.
TikTok supports longer uploads now, but short, punchy videos still dominate the For You feed for most creators.
- Aspect ratio: 9:16 vertical (1080x1920).
- Length: short clips of 15-60 seconds tend to perform best, though longer is supported.
- Leave a safe margin on the right and bottom for on-screen buttons.
Instagram Reels and Facebook
Instagram Reels use the same 9:16 vertical frame as TikTok and Shorts, which makes cross-posting easy if you plan your safe zones. Facebook accepts vertical, square, and horizontal, but vertical and square take up more screen space in the mobile feed.
For feed videos where you are unsure, square (1:1) is a safe, space-efficient middle ground that displays well almost everywhere.
- Instagram Reels: 9:16 vertical (1080x1920), up to about 90 seconds.
- Facebook feed: vertical (4:5 or 9:16) or square (1:1) for maximum mobile real estate.
- Facebook horizontal (16:9) still works well for longer, desktop-oriented videos.
A simple cross-posting strategy
You do not need to film everything multiple times. Create your primary video in 9:16 vertical, keep essential content within a centered safe zone, and you can reframe or export it for nearly every platform.
When you need a wide version for YouTube, plan the shot with extra room on the sides so nothing important gets lost. Tools that let you generate or export a video in multiple aspect ratios — VideoAI Studio among them — save you from rebuilding each cut by hand.
- Design vertical first, since most short-form platforms demand it.
- Keep text and faces centered so you can crop to square or wide safely.
- Export a dedicated 16:9 version for YouTube rather than stretching a vertical clip.
Quick-reference cheat sheet
Use this as a fast lookup before you export.
- YouTube (long-form): 16:9, 1920x1080, length flexible.
- YouTube Shorts: 9:16, 1080x1920, up to ~60 seconds.
- TikTok: 9:16, 1080x1920, ~15-60 seconds ideal.
- Instagram Reels: 9:16, 1080x1920, up to ~90 seconds.
- Facebook feed: 1:1 or 9:16 for mobile; 16:9 for longer desktop videos.
Frequently asked questions
What is the best aspect ratio for social media video?
For short-form video on TikTok, Reels, and Shorts, 9:16 vertical is best because it fills a phone screen. For YouTube long-form and desktop viewing, 16:9 horizontal is standard. Square (1:1) is a flexible option for feeds.
Can I use the same video on TikTok, Reels, and Shorts?
Yes. All three use 9:16 vertical at 1080x1920, so a single vertical video can be cross-posted. Just keep text and key visuals centered so each platform's on-screen buttons do not cover them.
What resolution should I export social media videos at?
1080p (1920x1080 for horizontal, 1080x1920 for vertical) is the reliable standard. Shoot or generate at a higher resolution when you can, so you have room to crop and reframe without losing quality.
How long should social media videos be?
It depends on the platform and goal. Short-form clips of 15-60 seconds suit TikTok, Reels, and Shorts, while YouTube long-form can run several minutes as long as it holds attention. Match length to viewer intent, not an arbitrary target.
One video, every aspect ratio
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