[honeybadger2k5]

having a hard time finding a list of Mbuna that top out at around 4inches.

can anyone point me in a direction?

 

[DJRansome]

Browse through the Cichlid-forum profiles. Keep in mind that a small size does not mean they are more appropriate for a small tank.

Many mbuna mature at 6 inches on average. You can keep most 6 inch mbuna in a 48x12 tank, but some 4 inch mbuna are better in larger tanks. This is related to aggression levels more than the mature size of the fish.