I'm kicking myself like you have no idea for getting those neon tetras. cute, but...enh.

the betta is wicked old, he was my good friend Casey's since she was little and when she went off to college

I took him in.

he's an old fella, somewhat dull and bent, but happy. He's in the tank because in a bowl he's positively miserable. but anyway, Kiko gets dibs on the tank and heated water.
oh, I spaced out when I read your post. you put the inches in...
thing is, none of my fish are that big.

my lyretail
might be 2 and a half at most. the gold molly's barely 1.5. umm, what else? my gourami's probably 4, maybe 4.5. my beloved cories

(will forever have a place in my heart, talk about adorable!) are most likely one inch each...although maybe 1.5. my oto is puny, too. not sure if they all are...

also, my sweet little Hyperion is... *ponders* probably a half or 2/3 of an inch? she's growing every day though, I will admit. and Kiko and Eightfold get along fabulously. When I introduced Eightfold, Kiko was quite fascinated with his "feelers".

hehehe...
but yea, if my fish were all their "normal" sizes (I know that the sizes you provided are indeed their typical sizes) I would be in majorly humongous trouble. or, am I being silly and none of them are full-grown?
thanx. hopefully this christmas I'm lookin' at a new tank so I can spread my sweeties out a bunch...