Bluegills can get big, sometimes more than a foot, maybe even 16 inches! I think most end up at about 8 to 10 inches.
The other one, its hard to tell from the pix if it has lines of color horizontally on its side. Does it? If it does, then yup, TheKoiMaiden's right, chub. But if its more solid colored, I'd guess female red shiner. So, depending on which species, 3 to 7 inches.
What are you going to do with them? They can't stay where they are, both because of the prospective size of the bluegills and because neither of these are tropical fish. They need colder temps or they will have many health problems.