[Topsider]

Generally, 1.5-1.75". I'm not a fan of the big 2" cuff, not with my 30" inseam.

 

[Topsider]

Yes, you can. I always wonder, though, if longer pre-finished pants don't have other changes to the pattern, like a higher rise, that might not be desirable.

In most cases, they do not. Be on the lookout for pants tagged "long" or "tall," as these will indeed have a longer rise. Unless you're shopping in the big & tall section, however, most pants will have a regular rise regardless of their inseam length.

 

[Topsider]

A = Cuff width in inches
B = Trouser end width (1/2 circumference)
C = Shoe Size excluding width

A = B/C x 1.75

Can you post the derivation of that equation, please?