LinkedIn post image size: 1200 by 627

This frame is three pixels shorter than the 1200 by 630 used elsewhere, and that is the whole difference. Its ratio is 1.9139 against 1.9048, a gap of under half a percent, which is far below anything a viewer could see and below the rounding that most image pipelines apply anyway.

The simplification is unhelpful for a different reason from the Facebook frame. The greatest common divisor of 1200 and 627 is 3, giving 400:209, and 209 factors as eleven times nineteen, so there is no tidier form. Writing a CSS ratio of 400 / 209 is correct and looks like a mistake, which is a good argument for expressing it as the pixel dimensions instead.

In practice one 1200 by 630 master serves both this network and the link preview card, and nobody will ever notice the three pixels. The reason to keep the distinction in mind at all is that a template built to the exact 627 will fail a validation check written against 630, and vice versa, so pick one number and use it consistently across your tooling.

There is no preset at 1200 by 627 in the tools here. The image resizer's OG and link preview preset produces 1200 by 630, which is close enough for any real use, and typed dimensions get the exact figure if a checklist demands it.