Platforms change their recommended sizes fairly often. Here's the current spec for the ones people ask about most.
Instagram
| Type | Size |
|---|
| Square Post | 1080×1080 px |
| Portrait Post | 1080×1350 px |
| Story / Reel | 1080×1920 px |
| Profile Picture | 320×320 px (displays as a circle) |
TikTok
| Type | Size |
|---|
| Video / Cover | 1080×1920 px |
| Profile Picture | 200×200 px |
LinkedIn
| Type | Size |
|---|
| Profile Picture | 400×400 px |
| Cover Banner | 1584×396 px |
| Post Image | 1200×627 px |
X (Twitter)
| Type | Size |
|---|
| Profile Picture | 400×400 px |
| Header | 1500×500 px |
| Post Image | 1600×900 px |
YouTube
| Type | Size |
|---|
| Channel Banner | 2560×1440 px |
| Video Thumbnail | 1280×720 px |
Why Getting the Size Right Actually Matters
Upload the wrong dimensions and most platforms will auto-crop your image — often cutting off exactly the part you wanted visible (a face near the edge, text near the border). Getting the exact size beforehand means you control the crop, not the algorithm.
The Fast Way to Resize for Any Platform
Rather than memorizing every platform's requirements, photoresizer.me has ready-made presets for Instagram, LinkedIn, YouTube, and more — pick the platform, drag to reposition, download. For anything not listed, use the custom size field to type in any exact pixel dimensions.