king's are alot bigger than normal betta's, 3 to 4 inches long i think and chunkier i'd say, i have a king, well that is still to be determined *lol* Jet, and he's huge but dimwitted, he's so funny, all muscle but really no brain hahahaha.
anyway's king's are generally plakats from what i hear, so if u do look up jet u'll see he's a veil tail..ignore that, i dunno what he is..
but ur lil' guy really looks like a girl, maybe they just miss labeled her. i dunno if they have king females also..someone else could help u out there....
anyways glad ur fish is doing fine!