Threads post image size
1440 × 1800pixels · 4:5
Threads doesn’t publish a recommended size. Its API accepts JPEG or PNG images 320–1440 pixels wide, up to 8 MB, and its ads crop anything taller than 4:5. 1440 × 1800 (4:5) is the largest size that won’t be cropped; design guides also use 1080 × 1080 squares. Treat this as a convention, not an official number.
Checked November 14, 2026
Crop your image to 1440 × 1800
Threads post image specs
- Recommended size
- 1440 × 1800 px
- Aspect ratio
- 4:5
- Also used
- 1080 × 1080 px (1:1 square)
- Minimum size
- 320 px wide (Threads API; smaller is upscaled). 500 px wide for Threads ads.
- Maximum file size
- 8 MB (Threads API)
- Formats
- JPEG, PNG
- Safe zone
- Threads ads doc: images taller than 4:5 are cropped and vertically centered to 4:5. Carousel ad images are center-cropped to 1:1.
Sources
Sources disagree on this one, or the platform doesn’t publish a number. The size above is the safest choice we found; see the summary for details.
- officialdevelopers.facebook.com/docs/threads/overview
- officialdevelopers.facebook.com/documentation/ads-commerce/marketing-api/ad-creative/threads-ads/creation
- secondarysproutsocial.com/insights/social-media-image-sizes-guide/
- secondaryblog.hootsuite.com/social-media-image-sizes-guide/
- secondarybuffer.com/resources/social-media-image-sizes/
Platforms change these often. If something looks out of date, let us know at hello@edits.io.
Frequently asked questions
What size is a Threads post image?+
1440 × 1800 pixels, an aspect ratio of 4:5. 1080 × 1080 (1:1 square) also works.
What is the maximum file size for a Threads post image?+
8 MB (Threads API)
How do I resize an image to 1440 × 1800?+
Drop your image into the tool on this page, drag and zoom to choose the crop, and download it at exactly 1440 × 1800. It runs in your browser, so the image isn’t uploaded.
Where do these numbers come from?+
From Threads’s own documentation and widely used design guides. We checked them on November 14, 2026; the sources are listed on this page.
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