~4inches full grown, it is about 3-3.5 right now. He eats like a pig, isn't shy and is sooooo bright. It's like a little yellow neon light swimming through my tank.
I was only charging $45 it at the store since it was a mistake shipment, but no one bit, so I said screw it and took him home. I had never been able to get one on purpose before, and who knows when I could get another one.
I don't think he is a jumper, and I'm praying he won't jump(open top, already tried and failed with the fairy wrasse), doesn't seem skittish at all so I think he won't be going airborne anytime...