Clown killies shouldn't get to be more than 3 or 4 inches maximum. I've never seen them larger than that. Lovely fish, btw, I wish my LFS would order a batch.
clown killies the black and yellow ones with some blue and red at the tails? they stay really small about 3cm or a little over a inch. one of the harder killies to raise after hatching. they spawn pretty much the same as many panchax species.