Gutenberg full-width image compatibility

Hi,

While I am using BB Page Builder for my static pages, I want to use the Gutenberg editor for my posts. Sometimes there are cases where I want to make a block full width (going past the default fixed width setting).

This does not seem to be built into the BB theme. My blocks go to the width of the container. Is there some sort of CSS code that I can use so I can use this Gutenberg functionality?

Thanks
Ricki