You need 8 wheels for a pair of roller skates (2 x 4 packs or 1 x 8 pack)

The Radar Varsity Plus 57 is the only narrow rink wheel on the market today featuring a metal hub for true control on the floor at all times. The urethane material of the Varsity Plus delivers great roll and durability while the aluminum hub provides a stunning appearance for the wheel. Sold in packs of four wheels. To order a full set of wheels, be sure to set your quantity to two.