Usually Cb sens will start to slow down tremendously in their growth rate once they hit about 6-7" and from there they will grow a max of 3-4" if that. And that growth will take a lot longerwhere you get him? my petsmart senegal has been growing at a very fast rate. thickened up a lot and is always eating. probably grew about an .75-1in a month. hes bigger than my delhezi which was the biggest poly i had and also outgrew my albino senegal very quickly. all are about 5-7 inches now i believe and i think it really depends on eating habits/ genetics