LMB could reach 6 lbs and 22" in a Wisconsin pond such as yours. But 20" and 4 lbs would be a more reasonable max size.
It is not inconceivable for the YP in your pond to go over 2 pounds and reach 16". A 2 pound YP is big by anyone's standards anywhere in the country. However, a 12" YP in a pond is a reasonable max size.
BCP could reach 18" and perhaps 3.5 lbs or so... That is huge crappie! If you already have 10"-16" BCP you are well on your way...
BG can go over 12" and in excess of a pound. But any BG over 8" in a northern pond is a fine fish.
As Theo said, CC are kinda in their own boat. And pond raised CC over 10 pounds is a nice fish. My father's friend in VA has raised them to over 20 pounds in his pond but that is exceptional and those fish were over 14 years old.
It is very challenging as a Pond Boss to have a pond where every species reaches their maximum size. You almost have to focus on one fish if you are looking for true maximums. That is the fun in being a Pond Boss, you get to manage your pond the way you want to...
