Get ready to lock and roll with this set of two medium Voluminous Hot Rollers measuring 1 3/4 inches in diameter. This size is ideal for creating wavy volume at the roots for shorter hair, soft curls for collar-lengths and tighter curls for longer lengths. Powered by T3 Heat Sink Core technology, each of the rollers contains an individual ceramic heater to imbue hair with long-lasting lift, extreme volume and sensational shine.