Thanks for the link, dirac. (Love love love that video of Tanny in Faun that's linked there.)
Photos can be tricky for comparing height, because there's the angle/perspective issue, plus figures are rarely standing straight up, and usually multiple figures are slouching (though of course that's not the right word, especially for dancers!) to varying degrees and in differing ways. (E.g. It's hard to judge from the photo of Tereshkina and Vishneva above, though I think canbelto's estimate is probably about right.)