Tons of sizes will fit. What do you want?
With the 7.5" width of the wheel you need to stay below 12" of tire section width to be safe. What size you go with will determine whether you need spacers to push the wheels out or not. Basically anything equivalent to 33x11.50 and larger will need spacers.
~Lots of modded Jeeps and a Toyota 4Runner~
My favorite quote from the press release.. sad but true: "Chrysler claims its products, especially the Jeeps, can handle all sorts of terrible conditions, churning through muddy swamps, climbing mountains, and crossing rivers. Turns out they cannot even handle a car wash."