I'll check tonight at home Huck, but I'm almost sure mine are 3/4. In fact, I bought a special socket for mine to prevent damage to the aluminum wheels when loosening or tightening the wheels. It's in the toolbox of my F-150, but that baby is parked at home most the time now while I drive the gas miser Fiesta I bought about a month ago. I bring the F150 to work one day/week.
Also, seems to me the studs on those wheels are 1/2"-20 thread. If your lug nuts take a weird lug wrench size, you could go to NAPA and get lug nuts that are more "normal".
2012 ParkLiner #006
2013 4wd Escape 2L Ecoboost with 3500# tow package
2001 F-150 XLT 4wd Super Cab 4.6L