Cross-platform · Share cards
Size the unfurl card—not the profile cover
When someone shares your URL, apps show a wide ~1.91:1 card. Export a dedicated share image, keep the headline centered, and do not reuse a Facebook cover strip.
Last verified 2026-09-06 Practical link previews sizes observed in community UI as of 2026-09-06. Not an official single-pixel mandate—preview on-device before you publish.
Link preview and OG sizes
These cards power URL unfurls. Covers and banners are different jobs—see the cover chart if you are editing a profile header.
| Platform | Surface | Size | Ratio | Guide |
|---|---|---|---|---|
| Open Graph | og:image Cross-network primary habit. | 1200 × 630 | ~1.91:1 | Open |
| Link preview | 1200 × 630 | ~1.91:1 | Open | |
| X (Twitter) | Link card Summary cards; 1200×628 also common. | 800 × 418 | ~1.91:1 | Open |
| Threads | Link preview | 1200 × 600 | 2:1 | Open |
| Bluesky | Link card | 1200 × 627 | ~1.91:1 | Open |
| Post / link image | 1200 × 627 | ~1.91:1 | Open | |
| Medium | OG image | 1200 × 628 | ~1.91:1 | Open |
| Substack | Social preview | 1456 × 1048 | ~14:10 | Open |
| Beehiiv | Social preview | 1200 × 630 | ~1.91:1 | Open |
| Post card | 1200 × 628 | ~1.91:1 | Open |
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Open Graph
og:image
1200 × 630 · ~1.91:1
Cross-network primary habit.
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Facebook
Link preview
1200 × 630 · ~1.91:1
-
X (Twitter)
Link card
800 × 418 · ~1.91:1
Summary cards; 1200×628 also common.
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Threads
Link preview
1200 × 600 · 2:1
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Bluesky
Link card
1200 × 627 · ~1.91:1
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LinkedIn
Post / link image
1200 × 627 · ~1.91:1
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Medium
OG image
1200 × 628 · ~1.91:1
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Substack
Social preview
1456 × 1048 · ~14:10
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Beehiiv
Social preview
1200 × 630 · ~1.91:1
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Reddit
Post card
1200 × 628 · ~1.91:1
Browser crop · stays on your device
Crop a link preview card
1200 × 630
Add a photo to crop
Upload a photo—or try the sample—then pick a preset from the chart above.
The share card shows before anyone opens the page
A practical Open Graph default—1200×630—works for Facebook, many Slack clients, and most large link cards. X often uses 800×418 or 1200×628; keeping the headline in the center usually covers both.
Threads leans slightly taller at 1200×600. Substack’s social preview is a different shape (~14:10). When in doubt, start with 1200×630 and re-crop the outliers.
Do not upload a link card as a Page cover or X header. Those surfaces use different ratios and avatar overlaps—use the cover photo chart instead.
Quick picks
Match the job to the row so you do not export the wrong ratio.
- Setting og:image on a website → Open Graph 1200×630.
- Facebook shared URL → Link preview guide (same habit).
- X summary card → Link card guide; keep type in the center.
- Newsletter social tile → Substack or Beehiiv preview guides.
- Editing a profile header → Cover photo sizes—not this page.
Frequently asked questions
What size should an Open Graph image be?
A practical primary size is 1200×630 (~1.91:1). Keep the headline in the center band.
Is a link preview the same as a cover photo?
No. Link previews are URL share cards. Covers are profile or Page headers with different crops.
Why does my unfurl show old art?
Caches linger. After you swap og:image, use platform debuggers or a new URL path until clients refresh.
Can I crop OG images here?
Yes. Download the JPG/PNG, host it on HTTPS, then set the absolute URL in your meta tags.