What should I do about friend's gf making fun of my height?

My friend's gf keeps making fun of my short stature (I'm 5'4") and I'm getting tired of taking it. She is far from the epitome of human perfection but I'd rather not stoop to her level and make her uncomfortable/self concious about any specific trait. Doing that would probably upset her and consequently my friend as well. At the same time I don't want to be like a little helpless cat by asking her to please stop being mean to me, as this would give them a funny story to laugh about behind my back at my expense. Any suggestions on how I can fix this issue?