What is aspect ratio?

Definition: Aspect ratio is the proportional relationship between an image or video’s width and height, written as width:height (for example 4:5 or 16:9).

Updated October 10, 2026

Why it matters

Each placement crops to its own shape. Upload a 16:9 image to an Instagram feed and the platform shows it small, with empty space; upload a 1:1 image to Stories and it floats in the middle. Taller formats (4:5, 9:16) take up more of the phone screen in feeds, which usually helps attention.

Common ratios (October 2026)
PlacementRatioPixels
Instagram feed (portrait)4:51080 × 1350
Instagram / Facebook Stories, Reels, TikTok9:161080 × 1920
Square post (all feeds)1:11080 × 1080
LinkedIn / Facebook link preview1.91:11200 × 627
X in-feed image16:91600 × 900
YouTube video and thumbnail16:91280 × 720 or larger
Pinterest pin2:31000 × 1500
Example

One product photo is exported three times: 1080 × 1350 for Instagram, 1200 × 627 for the LinkedIn link post and 1000 × 1500 for Pinterest, so nothing is cropped badly.

Related terms

  • Safe zone

    A safe zone is the part of an image or video frame that stays visible after the app overlays its buttons, captions and profile details.

  • Carousel post

    A carousel post is a single post containing several images or videos that people swipe through, one slide at a time.

Frequently asked questions

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