What size umbrella for queues?

Looking to buy an umbrella..mostly for shade. Pesky medical issues and I can no longer regulate my body temperature like normal. They’re allowed in queues, right? I haven’t seen or heard prohibitions.

I’d like the most sun and rain coverage possible without being a jerk to those around me.

Does anyone have insight on what size would be best? Do you have a size that works well for you? I’d love a 4-person golf umbrella but don’t want to be poking others or encroaching into their queue space.