Key takeaways
- Images: JPEG or PNG, 320 to 1,440 pixels wide, up to 8 MB, aspect ratio up to 10:1.
- Carousels: 2 to 20 images.
- Video: MOV or MP4, up to 1 GB.
- For the feed, 4:5 (1080 × 1350) or 1:1 (1080 × 1080) images fit well; keep one ratio across a carousel.
On this page
What image sizes does Threads accept?
Images narrower than 320 or wider than 1,440 pixels are scaled to fit, and colours are converted to sRGB. Within those limits, a 4:5 portrait or a square image fills the feed cleanly; very tall or very wide images show as thin strips.
| Media | Threads limit | Good size to use |
|---|---|---|
| Image | JPEG or PNG, 320–1,440 px wide, up to 8 MB, ratio up to 10:1 | 1080 × 1350 (4:5) or 1080 × 1080 (1:1) |
| Carousel | 2 to 20 images | The same ratio for every image |
| Video | MOV or MP4, up to 1 GB | 1080 × 1920 (9:16) |
| Text | Up to 500 characters | Lead with the point |
How many images can a Threads carousel have?
Between 2 and 20. Use the same aspect ratio for every image so the carousel does not jump as people swipe, and put the strongest image first, since it is the one people see before they swipe.
Are Threads image sizes the same as Instagram’s?
Close. Both work well with 4:5 and square images, so one set of images usually serves both, but the limits differ: Instagram has its own file and carousel rules. See Instagram image sizes before reusing a carousel.
How do you schedule images to Threads?
SkedCast checks each image against Threads’ limits as you add it: JPEG or PNG up to 8 MB, up to 20 in a carousel, or one video of up to 5 minutes. See the Threads character counter for the text and the Threads scheduler for every option.
Pick one ratio
4:5 or 1:1 for images, 9:16 for video.
Export within the limits
JPEG or PNG under 8 MB, 1,440 pixels wide at most.
Write the post
Up to 500 characters, with one topic tag if you use one.
Schedule it
Pick the account and time, or import a batch.
Sources
FAQ
- What is the best image size for Threads?
- 1080 × 1350 (4:5) or 1080 × 1080 (1:1), as a JPEG or PNG under 8 MB.
- What is the maximum image size on Threads?
- 8 MB, at most 1,440 pixels wide; wider images are scaled down.
- How many images can a Threads carousel have?
- 2 to 20, per Meta’s Threads API documentation.
- What video size does Threads accept?
- MOV or MP4 up to 1 GB; 9:16 vertical video fills the screen.
- Do Threads and Instagram use the same image sizes?
- Both suit 4:5 and square images, but their file and carousel limits differ.