please, please don't get any painted glassfish! theyare unnaturally dyed. naturally they are very pretty, clear fish, just glassfish. if you have a minute, please read this article! fish dyeing is a very cruel process and most dyedfish die during the process or soon after.
if you buy the dyed fish, it will only encourage the dyers more and they will dye more poor fish. :'(
A friend of mind has a pond in his back yard partially stocked with Blue Gills. The pond is frozen now, but in the summer the kids fish and release all that they catch. These Blue Gills are 5-6", how big is the one at school?