Is 1200x627 or 1200x630 correct?

Both work. LinkedIn documents 1200x627 as its minimum at 1.91:1; 1200x630 is three pixels taller and meets it, and it is what Facebook recommends.

What is the maximum OG image file size?

LinkedIn documents 5 MB and Facebook 8 MB. Stay under 5 MB and the same file works on both; a text image as PNG is usually far smaller.

Does the Open Graph protocol require a size?

No. The protocol at ogp.me defines og:image:width and og:image:height as the pixel size of your image, with no minimum or maximum.

OG image size: 1200x630, and what each platform documents

Last updated: November 10, 2026

Use 1200x630 pixels, a 1.91:1 ratio, as a PNG or JPG under 5 MB. Facebook recommends at least 1200x630 and LinkedIn asks for at least 1200x627 at 1.91:1, so one 1200x630 file meets both. The Open Graph protocol itself sets no size: og:image:width and og:image:height only describe the file you chose.

The numbers, with sources

Platform	Size	Ratio	File limit	Source
Facebook	At least 1200x630 recommended; under 600x315 shows as a small image; 200x200 minimum	Close to 1.91:1	8 MB	Meta for Developers
LinkedIn	At least 1200x627	1.91:1	5 MB	LinkedIn Help
X (Twitter)	summary_large_image card: at least 300x157, at most 4096x4096	2:1	Under 5 MB	X card docs, archived copy
Open Graph protocol	No size set	-	-	ogp.me

Facebook, LinkedIn and Open Graph values read from those pages on 2026-11-10. X no longer hosts its card docs on docs.x.com, so the X row cites the last archived copy of its official page (snapshot 2026-02-04), read on 2026-11-10. Platforms change them, so check the source before building a template around a number.

Why 1200x630 is the default

It is the smallest size that meets both Facebook's recommendation and LinkedIn's minimum, and its 1.91:1 ratio is the one both platforms ask for. Slack, Discord and most other apps that read og:image show a 1.91:1 image without trouble. X crops to about 2:1, which trims roughly 15 pixels from the top and bottom of a 1200x630 image, so keep text away from those edges.

Size is not the only thing that breaks a preview

Facebook caches the image by URL and must crawl it once before it can show it. To change the image, publish it at a new URL. (Meta for Developers, linked above.)
Use an absolute https URL in og:image. A relative path can leave the preview empty.
Set og:image:width and og:image:height to the real pixel size of the file, and og:image:alt to describe what the image shows.
Keep the headline large. Previews show the image far smaller than 1200 pixels wide, so small text becomes unreadable.

Check a page

The OG image checker reads a page's tags, loads the image and reports its size, ratio and weight against these numbers. Sizes for feeds, stories and CMS featured images are in the image size guide, and the tags and common mistakes are in OG image best practices.

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FAQ

What size should an OG image be?: 1200x630 pixels. It meets Facebook's recommendation and LinkedIn's minimum and has the 1.91:1 ratio both ask for.
Is 1200x627 or 1200x630 correct?: Both work. LinkedIn documents 1200x627 as its minimum at 1.91:1; 1200x630 is three pixels taller and meets it, and it is what Facebook recommends.
What is the maximum OG image file size?: LinkedIn documents 5 MB and Facebook 8 MB. Stay under 5 MB and the same file works on both; a text image as PNG is usually far smaller.
Does the Open Graph protocol require a size?: No. The protocol at ogp.me defines og:image:width and og:image:height as the pixel size of your image, with no minimum or maximum.