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

Sonar Aura Features:

The Sonar Aura offers good indoor skating performance at a nice price. Aura wheels have predictable grip, smooth roll, and excellent durability with little break in time. Sold in packs of four wheels. To order a full set of wheels, be sure to set your quantity to two.