@hollosch rather than dimension, I believe image/writing itself is more important. You can move/adjust the picture after you upload it; however how it looks on the desktop will be different from how it looks on mobile.
Here are the examples from our site:
on mobile:
[image: 1641413737029-img_5766-copy.png]
on desktop:
[image: 1641413873661-screen-shot-2022-01-05-at-2.56.15-pm-resized.png]
I guess you can see the difference...
