Set of 4 OEM quality 3" wheel spacers are 1.5" per side and will fit most any vehicle with a 5 x 5.5 (5x139.7) stud pattern where you are trying to use.
A set of 4 OEM quality 3" wheel spacer adapters are 1.50" per side and will fit all vehicles with a 5 x 4.5 to 5.45 wheel bolt pattern with 1/2 RH threads.