I wonder the same thing about my filly. I told you in another thread what my vet said about their growth at a year old, but I just don't believe it. There's the string test where you measure from the middle of the knee to the coronet. I believe one inch = one hand. (?) Luna measured out to 15 inches. I'm a shorty so I don't really mind if she's on the shorter side, but it would be nice to have an idea.
Stella - sweet, timid, elegant, lovely, lively, amazing
Luna - large, unattractive, naughty, adored