I get that it’s becoming annoying because they say it repeatedly. But I think if you stop reacting to it or act like you don’t care about it anymore, they will eventually stop. This from personal experience. My friends like to tease me to but only because they find my reaction funny. So when you stop they stop 
Also if you’re considered tall depends on your age and where you come from, I think. If you’re young, you will grow taller eventually. If you’re an adult, then not. But where you come from effects it too, I believe. Where I come from the average woman is around 5’5 (167 cm) and the man is around 5’11 (181 cm). So in other countries you can be considered short, tall or avarage.