I don't get the attitude that's going on in this thread.
Come on-- first of all-- males tend to be bigger than females. Can we all agree to that? Generally speaking? So why would a Savannah breeder hide (which the word 'cull' was used, but it actually is a very bad word-- that means kill, so we'll go with hide) a male kitten of F1/F2 generation from a potential buyer? Are we hoping the magic fertility fairy is going to show up and poof, make his balls fertile? No. That's just silly.
So yes, we offer our males for sale, but as Paige did point out-- we do not GUARANTEE SIZE.
I placed Jack-- who was like 25 pounds at 9 months or something crazy-- with a couple. They asked at 8 weeks, will he be big? I said, "He is a big boy at this moment, but I cannot guarantee size." They asked at 12 weeks if I thought he was big-- I said, "He's bigger than most of my boys at this age, but I cannot guarantee size." Then he went home and he just kept growing!
But what if I had TOLD THEM he would be a monster kitten and he went home and didn't take off? For example-- all of my HUMAN babies have been in the top 90 percentiles for height/weight at birth. Each of my three boys have been like 90/95 percent on the charts at birth and for the first year. If I was looking to sell them, I could say, "Oh, they are huge and they'll be massive adults!" Guess what? I'd be wrong. Two of my three boys tapered off to be average height/weight for their age and my 3 year old is at the 99th percentile for height and still growing (but you know-- I expect his height will taper off too, but maybe he'll be a 6 foot, 6er like his Grandpa.)
That's the point everyone is trying to make. They are also trying to make-- quite humorously-- the point that you already should know since you own a Savannah. Size doesn't matter! Personality, health, etc, are the important aspects of a kitten/cat-- who cares if you have a huge kitten if he drops dead before he's a year old? Yes, makes great bragging for a few months and then you have a dead cat. Or if he's dripping snot or diarrhea for his entire life-- give me a 12 pound cat who is healthy over a 25 pound sick cat (and that's serious too-- medicating the bigger kids is a pain in the butt!)
There is no way to guarantee size. No way to guarantee weight. There is a way to guesstimate and it's how big the same sex older siblings from the exact same pairing are-- but that still only gives you a range of weights and an idea. And ideas can change-- for example, I thought my F6 kitten was going to be a brute of a baby for the first 2-3 weeks of life and now, I think he'll be normal F6 size.