Social Media Specs
Instagram Image Sizes and Video Specs (2026)
The Instagram specs that matter when you post: caption up to 2,200 characters, carousel up to 10 images, videos, or a mix, and a 1080 x 1350 (4:5) feed portrait as a safe size. Every figure below comes from Instagram's own documentation, checked September 2026.
Updated
Instagram Image and Video Sizes
| Format | Size (px) | Ratio | Note |
|---|---|---|---|
| Feed portrait | 1080 x 1350 | 4:5 | Markaestro suggestion within the limits. Tallest feed ratio Instagram accepts. |
| Feed square | 1080 x 1080 | 1:1 | Markaestro suggestion within the limits. Safe for every placement that crops. |
| Feed landscape | 1080 x 566 | 1.91:1 | Markaestro suggestion within the limits. Widest feed ratio Instagram accepts. |
| Reel or Story | 1080 x 1920 | 9:16 | Published by Instagram. Instagram recommends 9:16 for Reels and Stories. |
Instagram Text Limits
| Spec | Limit |
|---|---|
| Caption | 2,200 characters |
Instagram Image Requirements
| Spec | Limit |
|---|---|
| Format | JPEG |
| Max file size | 8 MB |
| Aspect ratio | 4:5 to 1.91:1 |
| Width | 320 to 1,440 px (scaled into this range if outside it) |
Instagram Video Requirements
| Spec | Limit |
|---|---|
| Container | MOV or MP4 |
| Codec | HEVC or H.264, AAC audio |
| Frame rate | 23 to 60 FPS |
| Reel length | 3 seconds to 15 minutes |
| Reel file size | 300 MB max |
| Story video | 3 to 60 seconds, 100 MB max |
| Aspect ratio | 9:16 recommended |
Multiple Images and Carousels
| Spec | Limit |
|---|---|
| Carousel | Up to 10 images, videos, or a mix |
How Markaestro Handles These Limits
The Markaestro composer checks Instagram posts against a 2,200-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 Instagram posts.
Frequently Asked Questions
What size should Instagram posts be?
1080 x 1350 pixels (4:5) for a feed portrait. Tallest feed ratio Instagram accepts.
What is the Instagram character limit?
Caption: 2,200 characters.
How long can a Instagram video be?
3 seconds to 15 minutes.
What is the Instagram file size limit?
300 MB max.