Both of my P-basses at the 12th fret:
G string - 1.75 mm
D & A strings - 2mm
E String - 2.75mm
Admittedly, the G is maybe a tad too low. I usually play with my right hand just behind the pup (bridge side). If I play on the neck side of the pup, the G will sometimes graze the board if I dig in too hard. I raised my E for the same reason.
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MIM Fender P-Bass Club #95...Official Fender Precision Bass Club #606
Bald Bassists with Goatee club #?