Answer:
Well the height all depends on the genetic line or if it is a purebred or not. A normal purebred 9 month old lab should be almost fully grown by now, so if it is a female probably 21-23 in. if it is a male than it can be 22-24 in. tall. But like my dog, if he/she comes from a bad line they can be 9 months old and be 28 in. tall. Also if he/she is a mix its height can vary depending on the other breed of dog mixed into the lab portion.