1/8' hardware cloth
edweather(Zone 5a/b Central NY)April 4, 2012
FWIW, there's a guy on EBAY selling 1/8" hardware cloth 24" wide, by the linear foot. I just got 2 feet of the stuff shipped right to my door in 3 days, for less than $10. Not too bad considering the cost of my time and gas these days.