// GLOSSARY · 4:5 VIDEO

4:5 video

Portrait video aspect ratio (1080×1350) — the current preferred format for Instagram and Facebook feed (non-Reels) posts.

4:5 is Instagram's preferred feed ratio as of 2023+. At 1080×1350 pixels, it occupies more vertical screen space than 1:1 in the mobile feed, which translates to higher dwell time and higher engagement per impression. Facebook feed renders 4:5 cleanly as well.

4:5 does not work for Reels (which require 9:16) or for YouTube (which prefers 16:9). It's a feed-specific format, not a cross-platform one. Creators who want one master asset for everything settle on 1:1 or produce both 4:5 (for IG feed) and 9:16 (for Reels) versions.

Kompozy's Photo Posts and Persona Photos default to 4:5 when the destination outlet is Instagram or Facebook feed.

Related terms

Aspect ratio — The proportional relationship of a video or image’s width to its height, expressed as W:H (e.g. 9:16, 1:1, 16:9).
1:1 video — Square video aspect ratio (1080×1080) — the legacy Instagram feed format, still useful for cross-posting across many platforms.
Vertical video — Video shot or cropped at 9:16 aspect ratio, optimized for phone-held viewing on Reels, Shorts, TikTok, and Stories.

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