how big will my fish grow?

They are all healthy guys and the breeds are a follows. ( I have 19 of them in total) 2 shubunkins 1 fancy shubunkin 1 fancy cross shubunkin (this guy is orange with whit and black spots and stripes) 3 black moors 1 ryukin 1 telescope And 1 comet I have a 2 and a half foot fish tank in length and it's a foot and a half in height and 1 foot wide. I have plants aND high quality filtration and I feed them small amount of a variety of flake and blood worms daily they are all healthy and I would like to know the full potential of their growth.