Well, Baryshnikov and Edward Villella were considered short. Baryshnikov is about 5'8". I think anyone over 6' would be considered tall. For a woman I'm not as sure, but I recall reading that Julie Kent was one of ABT's tallest ballerinas at 5'7". I know ABT has at least one female corps member who is 5'9". Maybe a female dancer would be considered short at 5'2"?
I don't think Baryshnikov is 5'8" because when I talked with him, and being a former member of ABT I often did, he seemed a bit shorter and I'm only 5' 7" and I always thought 'Oh, at last, someone is shorter than me'.
Cynthia Gregory always had to worry about partners because of her height. That's why she was relieved when Godunov joined the company. Remember him? Ivan Nage was also OK for her but felt better with Makarova. I forgot who partnered Cynthia in Firebird but possibly Nage. I'm going back here to the Golden Years of ABT.