I myself wouldn't mount anything under 3.5 to 4.0 lbs.In most of ms. lakes 3's are common.A fish over 19" would have to be over 4 lbs. I would say. I really don't know the equasion to determine weight by girth and length. I'll have to check into it. I'll mount a 3lb.er with a fork and some tartar sauce.
OLD FISHERMEN NEVER DIE, THEY JUST SMELL THAT WAY!!