Actually, I'd give it 3.5 if that were an option.
I am 6'4" tall and wear 34" waist in jeans.  I was looking for boxers to sleep in and I like for them to be long enough that everything stays in.  Stafford used to sell long boxer shorts and they were perfect.  These are long enough, but the crotch is a little low as well (just like the photo).  The fit is a little weird, but I am happy about the coverage.
The main problem with these boxers is the SMELL. The material in the waistband smells very strong even after washing twice. It has a kind of sick rubber and tofu smell. It is tolerable after two washes and I hope it continues to improve.