Sorry, forgot the sample size. We have 60 hands on the guy up to this point. That makes sense don't 3b unless you know what to do to a 4b.

But why doesn't our sizing effect his fold freq? Surely a smaller 3b to say .55 will widen his calling range to include like 55-TT, some suited aces and broadways? But then again you're right, we can't really say this with much confidence as we have such a small sample on him..