I use the “Fenway Park” unit of crowd estimation.
When I attended Red Sox games back-in-the-day, the pre-expansion antique ballpark held 33,000 people.
I remember the size of the crowds there, and compare it to what I see at the rally.
25,000 is a good estimate, based on Fenway Park. :-)
Fenway Park metric is good enough for me. :)
This is another crowd he really doesn’t want to leave. You can always tell.