On our club chart, a 20" fish is 5 lbs on the button, but it is a largemouth chart. A 20" smallmouth can be five but I would say around 4 1/2 would be more the average. I have caught one 20" prespawn in the Spring at Milford that weighed right at 5, but I also caught a 21 that weighed 5.2 and a 21 1/2 that weighed 5.6.

I believe weight and length ratios vary greater than most think. Caught an 18" smallmouth at Wilson this year that only weighed 2.7, but have caught that length before with weights well over 3 lbs. Anyway you slice it, a 20" smallie is a STUD.