I'm more than a decade older than you two kids. Australorps should be: Cock 8.5 lbs hen: 6.5 lbs. Unless you weigh them you will not know where you are in size/weight.
Walt
Totally agree with you Sir. Over the years, I've had the opportunity to weigh many of my birds and some if not most are as much as three pounds over that size on both genders.