You're either in the northern hemisphere or wrong about her age.
25g is far enough away from the centre of the spectrum to be at least mildly concerning for a 14 month old.
What's the good breeding weight of a human woman? You could have two women of identical weight with one being obese and the other being underweight. If we assume she is of average height and typical bone structure we could make some better guesses, say, 55kg (give or take depending on race etc), but I know women who would be morbidly obese at 55kg and others who would be significantly underweight. It's common to quote breeding weights for snakes and you're welcome to google the usual figures, but it makes even less sense to use a raw mass figure as a yardstick for snakes than for humans. Experience will allow you to do it by eye, and using mass as your guide isn't useful. Obviously however you look at it, yours has a long way to go and breeding weight/size isn't something you need to worry about in the near future.