LionFish says......
On average, they grow to be about 7 or 8 inches at full length. Not reallt "Dwarf" Fish but they do stay smaller than the other lions. Trust me, you will be able to find a picture of one in any fish books or searching through the internet. Some good fish to keep with them are Puffers, Eels, large Wrasses, Triggers, Hamlets, other lions, squirrelfish, and groupers. Tangs can be kept with them but I usually warn people not to get them in aggressive tanks with messy eaters like lions. This is because tangs need almost perfect water conditions and it can be easy for the water to be fouled by the other fish. If you do get one, be sure to get a lot of filtration and a UV sterilzer. Tangs are, in my opinion, too sensitive for most aggressive tanks.