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6" is good most of the time small enouph you dont burn your self out plugging holes for perch but big enough for most bigger fish, i started with a 8" lazer bigger the better right? found out quickly youll have rubber arms and sweatin not good when its 10deg out
A clean true 6" hole should get most all the fish you are going to catch out.
Until you get between 18 inches and 2 foot of ice, then it's difficult.if you get lots of thick ice, go big.
6" is plenty big...you start goin 8 and 10 they become little treasures to step in when walking
Looks like an opportunity to highjack this thread and turn it into a Nils is the greatest auger ever thread but i wont. Badger is right though. Most fish you'll catch will have no problem fitting through a 6 in hole
I also agree with this, but if you use the 6 inch auger, make sure you keep your holes as clean as possible right to the edges, any little bit of ice building up on the sides could cost you.