3/16 x 3/8 x 1/8 bearing is the standard bearing for the B4, B3, B2, XXX, XX, TC3, T4, TC4, & T3 for hubs, wheels, and transmissions.. Check your manual for the correct size for you vehicle if you are not certain.
Bearing Dimensions
STANDARD: 0.1875" (Inner) x 0.375" (Outer) x 0.125" (Width)
FRACTION: 3/16" (Inner) x 3/8" (Outer) x 1/8" (Width)
METRIC: 4.7625mm (Inner) x 9.525mm (Outer) x 3.175mm (Width)