My display is 24 x 12 x 12 - do we think that's too small for a six-line wrasse? He'd be the only fish in the tank. I've presently got some corals, a few snails, and an unruly horde of amphipods in there.
I want one of those too, but my tank is a FOWLR right now and they need reef tank where they can hunt they meals and be happy, so I guess I have to wait to buy one :(. If your tank is small you shouldn't keep more than one fish in it.