I've searched on these forums and across the internet to see if others have come across this but no such luck. Somewhere over the course of the game my Nord character has shrunk in height. He now stands at shoulder height to Aela and other than children i believe he's the smallest person in the game.
Ive got no idea when this happened or what triggered it, tried contacting beth support but got nothing back.
This cant be unique to me someone else must have seen this happen?

http://www.gamesas.com/topic/1312657-help-my-imperial-has-shrunk-in-size/page__p__19761608__hl__shrunk__fromsearch__1#entry19761608

not sure if it does any good but you could try reporting it and maybe within the next 15yrs they might fix it http://www.gamesas.com/topic/1339340-xbox-360-bug-report-topic-v3/

good luck