Knitting for Charity has instructions on how to lengthen knitted garments, just in case, you know, you’re like “vertically challenged” like I am!
But, a word of warning, it requires scissors, so take a deep breath….
http://www.knittingforcharity.org/easy_instructions_for_lengthening_knitted_garments.html
Not too long ago I did a test knit for another designer that was for a cabled cardigan. It’s really cozy and nice but it just about broke me in a ton of different ways. I couldn’t get gauge, which I suppose is my own problem, but mainly I was somehow both bored and forced to pay attention at the same time.