Hi @WillWill, thanks for the post, it would help to see an example of the post, while it is not possible to adjust the image size like shown in your diagram using the built in image sizing in the Rich Text, there may be other ways to pull off the effect through structure of the page, styling of the rich text block or using some custom css.
Here is how to share the project read only link: Share a read-only link | Webflow University
If you can let us know what page the layout is on, that will help.