# Aspect ratio (9:16)

> Aspect ratio is a video's width compared to its height; 9:16 is full-screen vertical video, 1080 pixels wide by 1920 tall.

Canonical: https://use-addy.site/glossary/aspect-ratio
Last updated: 2026-10-26

Also called: 9:16, vertical video

9:16 fills a phone screen and is the native size for Reels, TikTok, Shorts and Stories. Feeds also accept 4:5 and 1:1, but a 9:16 master can be cropped to those, while a square video cannot fill a vertical screen.

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