Threads post images display best at 1440×1800 pixels (4:5 portrait ratio) for maximum feed presence, or 1440×1440 pixels for square format.
Recommended Size
1440 × 1800
pixels

The 4:5 portrait ratio maximizes your post's presence in the feed. At 1440×1800 pixels, your image displays crisp on all devices. This matches Instagram's recommended dimensions, making cross-posting seamless.

Threads is primarily text-based, so images naturally draw attention. A well-composed, properly sized image stops the scroll. Use this visual advantage to complement your written content.

Upload your image and resize it to 1440×1800 pixels for portrait format or 1440×1440 for square. Download and attach to your Threads post.
Choose an image that adds value to your post. On Threads, images should complement your text, not replace it.
Upload your image and resize to 1440×1800 pixels (portrait) or 1440×1440 (square).
Position key elements where they won't be obscured by UI elements or text overlays.
Create a new thread and attach your resized image along with your text.
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Threads post images work best at 1440×1800 pixels (4:5 portrait) for maximum feed presence, or 1440×1440 pixels for square format.
Here are more Threads asset sizes with their own dimensions.