Welcome bkundework,
The people above who answered your questions, plus a number of others on this forum, have helped make my pond a bluegill fishing heaven.
Last night, in 15 minutes, I caught eight bluegill. Their sizes were 5, 7, 9 , 9.5, 9.5 10, 10, and 10 inches. The 5, 7, and 9 didn't go back in. The other five were husky males who went back. Two years ago I would never have thrown back a 10 inch bluegill -- that is, if I had even caught one.
Lots of great people here, and lots of invaluable advice.
Good fishn'
Ken