The sizes and where they come from
Each size is one a network publishes, checked on 1 November 2026. For every network's shapes and file limits, see the image sizes guide, or check a finished file with the size checker.
| Size | Pixels | Where it goes |
|---|---|---|
| Feed photo 4:5 | 1080 × 1350 | Instagram, LinkedIn, X, Threads. Source 1 Source 2 Source 3 Source 4 Source 5 |
| Story 9:16 | 1080 × 1920 | Instagram, Facebook. Source 1 Source 2 |
| Pin 2:3 | 1000 × 1500 | Pinterest. Source 1 Source 2 |
| Video thumbnail 16:9 | 3840 × 2160 | YouTube. Source |
| Shorts thumbnail 9:16 | 2160 × 3840 | YouTube. Source |
| Link image 1.91:1 | 1200 × 630 | Facebook, LinkedIn. Source 1 Source 2 |
Crop or fit
- Crop fills the size and cuts off what doesn't fit. Tap the part that matters, and every crop keeps it in view.
- Fit keeps the whole photo and fills the space around it with a blurred copy of the photo, white or black.
- The files are JPEGs, which every network takes. Location and camera details in your photo aren't copied into them.
- In Unisenda, you can also crop a photo for each network inside the post itself, and it flags a shape a network would refuse before you schedule.
Questions people ask
Is my photo uploaded?
No. Your browser makes the new sizes on your device. Nothing is sent to Unisenda, and nothing is kept once you close the page.
Why is there no size for Facebook posts or X?
Facebook, X, Threads and Bluesky don't publish a recommended photo size. The feed photo works there: its 4:5 shape is inside the ranges LinkedIn, X and Threads publish, and Facebook and Bluesky publish no shape limits.
Should I crop or fit?
Crop fills the whole size and cuts off the edges, so tap the part of the photo you want to keep. Fit shows the whole photo and fills the space around it with a blurred copy of the photo, white or black.
Can it open iPhone HEIC photos?
Safari can, but most other browsers can't. Export the photo as a JPEG first, or set your iPhone camera to Most Compatible.
Why does one size look soft?
When your photo has fewer pixels than a size, it's enlarged to fill it, and the card says so. YouTube's thumbnails are the largest sizes here, 3,840 pixels on the long side, so smaller photos are enlarged for them.
Sources
Checked on 1 November 2026. Networks change their rules, so check the source before you rely on a number.
- Instagram Help Center: Image resolution of photos you share on Instagram
- Meta for Developers: IG User Media
- LinkedIn Help: Share photos
- X Help Center: Posting photos or GIFs
- Meta for Developers: Threads API overview
- Meta for Developers: Facebook Stories API
- Pinterest Business Help: Review ad specs
- Pinterest Help: Review Pin specs
- YouTube Help: Add custom thumbnails on YouTube
- Meta for Developers: Images in Link Shares
- LinkedIn Help: Share articles or links
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