How to measure your hand accurately and determine your glove size:
Measure the circumference of your palm on your dominant hand with a flexible tape measure. Place the beginning of the tape measure (at 0 inches) directly over the inside of your thumb, in the gap between the thumb and index finger. Wrap the tape measure completely around your palm (from its initial point above your thumb to the outside of your little finger and back again). Check where the tape measure is at the initial point overlap.