is there an average rate at witch pups grow?

my youngest bitch has grown a lot in height over the past 6 weeks. will this slwo down now (she is almost 4 months).

i suppose what im asking is at what age do most dogs reach adult height. i knwo it will probably depend on the breed. in this case my bitch is a staffy x collie.

I would expect a medium size breed like my own to reach within hakf inch of adult height by 9 months old, after that they may add a half inch but they will mostly then develop more mass.

I kept tabs on my last pup out of interest (her Dads sires owner had a throry of what height pups should be at various stages to reach correct height by maturity) who is now nerly 20 inches tall, and she was 15 inches at 4 months and 18 inches tall at 6 months and 19 1/2 by 9 or 10 months.