Proper size is important. To determine glove size, measure the hand circumference across the knuckles at the base of the fingers. For gloves with wrist support, use glove sizing. When ordering it is best to order smaller than your normal size.
Impacto Size       Hand Size             Hand Circumference
X-Small                 6                            6" - 7", 15 - 18 cm
Small                     7                            7" - 8", 17 - 20 cm
Medium                 8                            8" - 9", 20 - 23 cm
Large                     9                            9" - 10", 23 - 25 cm
X-Large                 10                          10" - 11", 25 - 28 cm
XX-Large              11                          11"+, 28 cm+