This is my guess:
Aurora:I always thought she's tall,but she can be medium height either. I would say 1.70 m,but she can be under that too.
Pocahontas:She's very tall,almost as tall as John Smith and he was tall.She has really long legs too.I guess 180-182 m.
Cinderella: I think she's average height.She's shorter than Aurora. Anything from 165-169 m.She can look tall sometimes.
Esmeralda:She's not a Disney Princess,but I read somewhere that she's the tallest of all Disney Princesses.
My guess is anything from 180 to 184 m.Don't know if she and Pocahontas would be same heght.
Elsa:I read that she and Anna are tall,but they always looked petite to me.Elsa is taller than Anna.
Tiana:She seemed tallish to me.I guess she might be around 173-174 m of even under that.
Mulan:I guess Mulan is short,so maybe 160-162 m.Li Shang was quiet good taller than her.
Belle:Belle is short of average.161-165 m.
Rapunzel:She's short obviously.Everything about her seems so childish and innocent.157-160 m.
Ariel:I guess either short of medium height.She can appear tall,but that's cause of her posture. 162 m.
Snow White:Very short and that's noticeable.155-158 m
Jasmine:I think she's the shortest princess,even shortest than Snow White,so 154-155 m.

That's my opinion,please tell yours and don't judge please,if u don't like article,then don't comment. :)