Thing About Celestia Is That We Don't Even Know How Tall NORMAL Ponies Are,Much Less The Princesses (Minus Twilight) Who Are All Notably Taller Then Everypony Else. The Size Of Other Creatures Does't Help,Ether Because People Like Capper (From The MLP Movie) Are Bigger Then The Mane Six,Despite Being Animals (In This Case,A Cat) That Are Much Smaller Then Even The Smallest Pony In OUR World. Size Is Super Weird In MLP And My BEST Guess Is That Most Ponies Are About Child-Sized While Celestia Is Slightly Shorter Then A Human Adult. The EG Stuff Don't Help Much,Ether Since It Leaves The Question Of Age: Are The Mane Six Pony Versions Of Teenagers Or Are They Only That Age In The EG Universe? It's Pretty Confusing.@_@