What size patio umbrella do I need for my table?

Across the reviewers we read, the rule of thumb is to add roughly 4-5 feet to your table's diameter: a 9-foot umbrella suits a typical 4-6 person table, while 10-11 foot and cantilever models cover larger tables or open seating. Reddit threads in r/homeowners repeatedly stress that a wider canopy needs a correspondingly heavier base.