The PowerDyne Reactor Neo is replacing the PowerDyne Rival Plates. It is packed with features never before seen at a plate of this price point. It shares many of the same design elements as the Reactor Pro Series at a fraction of the cost.
Typically, the size of the plate is the same as the size of the boot. (men's size) For example, Size Men's 5 or 5 1/2 gets a Size 5 plate.