Seibertron Men's S.O.L.A.G. Special Ops Full Finger Tactical Gloves Method for choosing the size,According to palm circumference not including thumb. XXS=Youth M(6.3"-6.7",16cm-17cm) XS=Youth L(6.7"-7.1",17cm-18cm) S(7.1"-7.7",18cm-19.5cm) M(7.7"-8.3",19.5cm-21cm) L(8.3"-8.9",21cm-22.5cm) XL(8.9"-9.5",22.5cm-24cm) XXL(9.5"-10",24cm-25.5cm) Centimeter data has less deviation than inch data Material, PU and Synthetic leather