Aspect ratio (9:16)
Also called: 9:16, vertical video
Aspect ratio is a video's width compared to its height; 9:16 is full-screen vertical video, 1080 pixels wide by 1920 tall.
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.
Related terms
Part of the Addy video ad glossary. Addy is an AI agent that writes, renders and posts short-form video ads.