---
type: note
tags: [public, thumbnail, sm, aspect ratio, ratio]
created: 2025-10-27T09:17:57.483Z
---# 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
YouTube	Thumbnail	1280 × 720	16:9
Instagram	Square Post	1080 × 1080	1:1
Vertical	1080 × 1350	4:5
Landscape	1080 × 566	~1.91:1
Stories/Reels	1080 × 1920	9:16
Facebook	Square Post	1080 × 1080	1:1
Vertical	1080 × 1359	~4:5
Landscape	1080 × 566	~1.91:1
Stories	1080 × 1920	9:16
LinkedIn	Square Post	1200 × 1200	1:1
Landscape	1200 × 627	~1.91:1
Vertical	720 × 900	4:5
X (Twitter)	Square	720 × 720	1:1
Landscape	1280 × 720	16:9
Vertical	720 × 1280	9:16
TikTok	Vertical	1080 × 1920	9:16
Square (ads)	640 × 640	1:1
Landscape (ads)	1920 × 1080	16:9


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