ADULT UNISEX GLOVES SIZE CHART
  S M L XL 2XL
Men's/Unisex 7-7 1/4 7 1/2-8 8 1/4-9 9 1/4-10 10 1/4-11
Circumference (inches)
Men's/Unisex 17.8-18.4 19.1-20.3 21-22.9 23.5-25.4 26-27.9
Circumference (cm)

How to measure your hand to get the right glove fit. Hold your hand flat with your fingers together. 
Measure around your knuckles. Do not include your thumb in the measurement.