---
type: note
tags: [public, thumbnail, sm, aspect ratio, ratio]
created: 2025-11-06T02:51:46.19+00:00
updated: 2026-04-06T10:49:17.051411+00:00
---# sm thumbnails sizes aspect ratio

**URL:** [https://chatgpt.com/c/673e63ea-b2bc-8009-8fa8-6de868276448](https://chatgpt.com/c/673e63ea-b2bc-8009-8fa8-6de868276448)

Platform	Format	Size (px)	Aspect Ratio\nYouTube	Thumbnail	1280 × 720	16:9\nInstagram	Square Post	1080 × 1080	1:1\nVertical	1080 × 1350	4:5\nLandscape	1080 × 566	~1.91:1\nStories/Reels	1080 × 1920	9:16\nFacebook	Square Post	1080 × 1080	1:1\nVertical	1080 × 1359	~4:5\nLandscape	1080 × 566	~1.91:1\nStories	1080 × 1920	9:16\nLinkedIn	Square Post	1200 × 1200	1:1\nLandscape	1200 × 627	~1.91:1\nVertical	720 × 900	4:5\nX (Twitter)	Square	720 × 720	1:1\nLandscape	1280 × 720	16:9\nVertical	720 × 1280	9:16\nTikTok	Vertical	1080 × 1920	9:16\nSquare (ads)	640 × 640	1:1\nLandscape (ads)	1920 × 1080	16:9


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**Keywords:** public, thumbnail, sm, aspect ratio, ratio
