I'm glad this thread has come up again, because I've noticed a lot on this forum lately people wanting to know the size of their weim and when they will be getting bigger/how big they'll get etc.
Weimaraners are not a HUGE breed. Sure you will get your odd example (met the biggest weim i've ever seen last year, he was the size of a dane - a half brother to my girl), but weimaraners are a MODERATE breed and shouldn't be hugely boned, massively muscled dogs, nor should they be tall. A big weim should not be the norm, it should be unusual.
Nothing pleases me more than to see a lovely muscled, moderate and elegant sized Weimaraner - unfortunately it seems like everything else, bigger is better these days

As I wrote on a previous post, I took size into account when i picked a stud dog. I picked a moderate sized male with nice balance and bone, as my female is not on the small side. The result has been a very nice size across the litter, with the female ending up around 62cm and 27kg (57lb). The males all range from about 65cm to about 68cm, nicely muscled but not heavy.