what size pot is the standard for your family crawfish boil?

We use a 50 gallon drum

Mine holds a sack but I usually split the sack. No idea on the size. It was a custom made hand me down.

100 is best

80 can get tight with a sack and fixins

I think mine's a 120.
Capable of doing a sack, some crabs and a shite-ton of lagniappe.
Or two sacks. It's versatile.

If the situation calls for less, I just don't fill it with as much water.

100 quart