Image Size Adjustment For Content

Hey Team,

I'd like to make my images set to 1200 width across so I can size them for Google Discovery. I want them to be in full size display (or close to it, maybe 1100 px) but only have the text width in the blog post remain at 900 px for the container layout size.

Is there some way to make sure the featured image and all images in the blog post are bigger in size than the text container?

A good example of what I'm looking for is here:

settingnorth.com/ontario-fly-in-fishing-for-walleye-and-pike/