I measured from outside flange area to shoe contact pad and get 1.5"

1.5" + 1.35" = 2.85

so is that a 2.5" or a 3" wide shoe?

I do see a set of 11x2 3/4" shoes for a c-body or truck.

would the 2.85 be a 2 3/4 wide shoes?

measure across and get 12" and subtract 1" = 11" drums