Social Media Image Size Guide 2026
Instagram, YouTube, Kakao and Naver
Upload at the size a platform expects and your image won't get cropped or come out looking soft. Every platform resizes images on its own, but matching the right dimensions up front makes the result noticeably sharper. Here are the recommended sizes for the major platforms as of 2026.
Contents
Note: Platform policies and interfaces change constantly. This guide reflects 2026; before an important campaign or ad buy, cross-check each platform's official documentation.
1. Instagram
Instagram displays photos differently depending on their aspect ratio. The feed supports three.
| Content type | Recommended size | Ratio | Max file size |
|---|---|---|---|
| Square feed post | 1080×1080px | 1:1 | 30 MB |
| Landscape feed post | 1080×608px | 1.91:1 | 30 MB |
| Portrait feed post (recommended) | 1080×1350px | 4:5 | 30 MB |
| Stories / Reels cover | 1080×1920px | 9:16 | 30 MB |
| Profile picture | 320×320px or larger | 1:1 | — |
| Reels video cover | 1080×1920px | 9:16 | — |
Instagram tip: To claim the most feed real estate, use the 4:5 portrait format (1080×1350). It occupies 35% more space than a square and stands out accordingly.
2. YouTube
On YouTube the thumbnail directly drives click-through rate, so making a high-quality one matters.
| Content type | Recommended size | Ratio | Max file size |
|---|---|---|---|
| Video thumbnail | 1280×720px | 16:9 | 2 MB |
| Channel art (banner) | 2560×1440px | 16:9 | 6 MB |
| Channel icon | 800×800px | 1:1 | — |
| Shorts cover | 1080×1920px | 9:16 | — |
YouTube tip: JPG is the recommended thumbnail format. Combining text with a face tends to lift click-through rates. Use large type so it still reads on a small screen.
3. Kakao (KakaoStory & OpenChat)
| Content type | Recommended size | Ratio |
|---|---|---|
| KakaoStory post image | 1200×900px | 4:3 |
| KakaoStory wide image | 1200×630px | About 2:1 |
| KakaoTalk profile picture | 640×640px or larger | 1:1 |
| Kakao Channel cover image | 1080×360px | 3:1 |
| Kakao Channel profile picture | 640×640px | 1:1 |
5. Facebook
| Content type | Recommended size | Ratio |
|---|---|---|
| Feed post image | 1200×630px | About 1.9:1 |
| Square feed image | 1080×1080px | 1:1 |
| Stories | 1080×1920px | 9:16 |
| Page cover photo | 1640×856px (recommended) / 851×315px minimum | About 1.91:1 |
| Page profile picture | 400×400px or larger (displayed at 170×170px) | 1:1 |
6. X (formerly Twitter)
| Content type | Recommended size | Ratio |
|---|---|---|
| Inline post image | 1200×675px | 16:9 |
| Header image | 1500×500px | 3:1 |
| Profile picture | 400×400px | 1:1 |
7. Quick reference table
For when you just need the numbers you use most.
| Platform | Most-used size |
|---|---|
| Instagram feed | 1080×1080 (square) / 1080×1350 (portrait) |
| Instagram Stories | 1080×1920 |
| YouTube thumbnail | 1280×720 |
| KakaoStory | 1200×900 |
| Naver Blog | Up to 1200px wide, any height |
| Facebook feed | 1200×630 |
| X post | 1200×675 |
8. Resizing for social media with ImgFixIt
Here's how to resize an image to a platform's recommended size in ImgFixIt.
- Upload your image
- Check "Resize" in the "③ Compress / Resize" step
- Enter the width from the tables above
- Let the ratio lock calculate the height, or type it in yourself
- Change the format to suit the platform (JPG is recommended for social uploads)
- Download