I remember looking this up almost every week when Maggie was growing up and it wasn’t until I started to talk to Orbit’s breeder and learn from other Boston Terrier Breeders that I knew how to answer this question.
So if you’re wondering how big your Boston Terrier will get? The general rule of thumb is: Take your Boston Terrier puppy’s weight at 16 weeks and double it. Add a pound for the boy. This is a general ballpark number as to what they will weigh as an adult. Keep in mind that studying the parents and their pedigrees will yield a better guess.
Another well respected breeder has stated she takes the weight of females at 15 weeks doubles it and for males takes the weight at 16 weeks and doubles it.
I took a look at Maggie and Orbit’s weight at 15 weeks and its’ VERY close.
Maggie was 8 pounds at 15 weeks – she weighs 16 pounds today give or take a few oz.
Orbit was 8.8 pounds at 15 weeks and she weighs 17 pounds today. She could gain a few more oz but she’s so active she burns off her food.