Hi Castanha. Back in 1982 I met some people in Sydney that had moved over from South Africa and had brought their RR with them. I had my first RR, Karinda with me when I was talking to them. He dwarfed my dog in height and size. They told me he weighed somewhere between 140 and 154 pounds. Told me he was great with kids but would drag the owners across a football field if he saw a dog he didn't like. I'd say he was at least 30 inches at the withers and looked like a RR with Boerboel in it to me.