Social Media Specs
Facebook Image Sizes and Video Specs (2026)
The Facebook specs that matter when you post: post text up to 63,206 characters, multi-photo post up to 10 photos in Markaestro, and a 1080 x 1920 (9:16) reel as a safe size. Every figure below comes from Facebook's own documentation, checked September 2026.
Updated
Facebook Image and Video Sizes
| Format | Size (px) | Ratio | Note |
|---|---|---|---|
| Reel | 1080 x 1920 | 9:16 | Published by Facebook. Meta recommends 1080 x 1920 for Reels. |
| Feed square | 1080 x 1080 | 1:1 | Markaestro suggestion within the limits. Crops cleanly in most feed layouts. |
Facebook Text Limits
| Spec | Limit |
|---|---|
| Post text | 63,206 characters |
Facebook Image Requirements
| Spec | Limit |
|---|---|
| Formats | JPEG and PNG |
Facebook Video Requirements
| Spec | Limit |
|---|---|
| Reel file type | MP4 recommended |
| Reel resolution | 1080 x 1920 recommended, 540 x 960 minimum |
| Reel aspect ratio | 9:16 |
| Reel length | 3 to 90 seconds |
| Frame rate | 24 to 60 FPS |
| Codec | H.264 or H.265 (VP9 and AV1 also accepted), AAC audio |
Multiple Images and Carousels
| Spec | Limit |
|---|---|
| Multi-photo post | Up to 10 photos in Markaestro |
How Markaestro Handles These Limits
The Markaestro composer checks Facebook posts against a 63,206-character caption limit and up to 10 media items while you write, and the media library accepts images up to 10 MB and video up to 250 MB. See scheduling Facebook posts.
Frequently Asked Questions
What size should Facebook posts be?
1080 x 1920 pixels (9:16) for a reel. Meta recommends 1080 x 1920 for Reels.
What is the Facebook character limit?
Post text: 63,206 characters.
How long can a Facebook video be?
3 to 90 seconds.