A teaspoon is smaller than a regular spoon. Is "ita" something that can be added on the end to anything that is small?
Yes of course
2008-08-23 I would guess that -ita is a diminutive for feminine nouns. I don't think I've seen one for masculine nouns as yet.
1 and 3d oprion are identical, so why is one of them wrong then?
Can I say femeita for a little woman?
No, you can't say "femeița", it's not a word in Romanian. But you could say "femeiușcă", though sometimes it has a rather pejorative meaning like an immoral woman.