The new ASF Caresheet does list some basic average weights at certain ages.

Just from my own small sampling of ASF's...

One of my male breeders, he'd be about 6 months old now, weighs in at 75-80 grams (haven't weighed him in a bit so that's an estimate).

My original breeder male who is now just over a year old and retired with his two non-producing females is 145 grams or thereabouts.

In both cases the females are pretty close the males in size. I don't notice as much difference in size by gender as I normally see in my regular rats.

Personally as much as I like the ASF's and intend to use them more and more with our snakes, they will likely never be a prey item for either our boas or our very big female ball pythons just due to the number of very large feeders I'd have to offer them and the time it takes those ASF's to get to that size. For me it's more time and cost efficient to use regular rats for those larger snakes.