3- 9" Bala Sharks, 1 7" female Gold Severum and 2- 8.5" Pictus Catfish in my 440 gallon custom made pond . In my tanks, the biggest fish would have to be my full grown 5" Pearl Gourami in my avatar.
Biggest I'd owned in the past was a clown knife which hit roughly 10" before I sold it. (I rescued it when it was perhaps 4" and was just keeping it until I could find it a better tank, even if it was another lfs. The tank it came from was horrible. Currently my biggest fish is a 3.5" discus.