Social Media Specs — Sizes, Dimensions & Aspect Ratios

Exact sizes, dimensions, aspect ratios and length limits for every major platform — each one verified against the official documentation and dated. Whatever you are exporting, the right number is here, with a plain-English explanation of why it matters and how to hit it. Pick a category:

Profile picture sizes — the exact PFP size and shape for every platform.
Thumbnail & cover sizes — YouTube, TikTok, Roblox, Etsy and more.
Aspect ratios — 9:16, 16:9, 4:5 and which to use where.
Post & banner dimensions — feed posts, YouTube banners, X headers.
Video length limits — how long a video can be on each platform.
AI video specs — length limits for Sora, Runway, Kling and more.

Need to resize something to one of these? The image resizer and aspect ratio calculator do it in your browser.