the royal is about 4" and the clown in about 3-3.5". i can't get a good shot of my big, ~5" bristlenose. he's always hiding in or under my driftwood. the clown is in my 55g with a pair of severums and the royal and bristlenose are in my 125g with SA cichlids. im wanting to find a green phantom but local stores are selling them for $90 lol i guess ill have to get some off line