Adding options to group block

I’d like to add the following options to the Group block:
float left/right and width (25/33/50 percent).

This should be rather basic (adding it as CSS is trivial), so I guess someone has done it already, but I can’t find any examples of how (tried searching here as well). Has anyone done it before? Do you have guide?

I can add it as block styles, but that means adding one style for each option. What I want is adding Left and Right as options where you already can select Wide and Full, and then add Width as an option in the block settings.

• This topic was modified 3 years, 2 months ago by Jan Dembowski. Reason: Moved to Fixing WordPress, this is not an Developing with WordPress topic