Mopar/dodge Diplomat wheel 15x7

5th Ave has four 15x7 and one 15x6 (as the spare) standard.
Super common to find one with 3 x7 and 1 x6 mounted and one missing.
Hard to tell them apart unless you know and are looking close.

Other M body cars could have either depending on wheel and tire options.
Most common on non cop spec cars is 15x6.

If you are JY-ing for some, make a set of wheel calipers using a couple of known width wheels to make the marks.

A sturdy cardboard box and a screw (OK, and a sharpie and scissors) is all you need.