Smaller than Domi's, not enough Bash crimes to get to that level

I would make it so big it makes colonies.

Big but not big enough to cause issues

I'd live in it!

like 800cm diameter

Door frames are never big enough

big

biiiiiig

Regular size.

it would not just be a witch hat, but a witch home. i would live inside

slightly to big to walk through doors without issues

A size that would shatter reality itself

the size of a witch hat

Probably pretty fricken huge. Definitely a brim as wide as my shoulders, MINIMUM

I'm Marisa Kirisame and my hat is HUGE