Troy Lee Designs gloves are all researched, designed and tested before making their way onto the hands of the world’s greatest riders. The Flowline Glove features a Velcro cuff and single layer palm for breathability. Micro-mesh is used all over for ventilation. Size Guide: Small = 6.5-7.5"(16.5-19cm) Medium = 7.5-8.5" (19cm-21.5cm) Large = 8.5"-9.5" (21.5cm-24cm) X Large = 9.5"-10.5" (24cm-27cm) XX Large = 10.5"-11.5" (27cm-29cm)