My biggest net is 18" x 16" triangle shape. Has a telescoping handle to 33". The front rim of the net is rubber made to flex. Looks just like this one http://www.infobarrel.com/Media/Frabill_Net
Hmmmm, maybe a pillow case with holes cut in it to release the water out for moving would work... Ya just a reg fishing net seems like it would hurt the fish which I don't wanna do, what about say the kids fishing net's ? They have a smaller styled net but it more closer to a fish net sold in LFS...
And places like home hardware sell pond nets that are a nice soft texture ? Or they rip easily with fish F1 lol