Well i bought a 9" blade last summer, i figured i would go with the largest blade i could find. What i didn't want was to get a blade that wasn't large enough to go through the fish all the way, like a catfish.

Anyway, a friend of mine gave me a smaller 7" filet knife for Christmas (yes i opened my Christmas gift early) and i remembered some folks had smaller filet knives, below 7" and i thought could there be a difference between cutting up a crappie or bluegill with a smaller knife vs a larger one.