how big will my bunny grow

I have an eleven week male bunny that is a cross between a continental giant and a british giant when will he stop growing and how big should i expect him to get?????

about the size of a small elephant.

He will stop growing somewhere between 9 months and a year due to the breeds he is a mix of and he is going to be a big bunny, I suspect in the region of 6-9kg at a guess.