One size fits all. In the glove world the length of the glove from the base of the thumb at the wrist to the hem is measured in a term called buttons where one button equals one inch. In other words a four button glove does not have four buttons, but measures four inches long from the wrist. To determine your glove size, measure the circumference around widest part of the four knuckles on your hand . Do not include the thumb! This length in inches is your glove size. Size A measures 5 inches to 6 inches. 6 inches to 8 inches is a size B. Most people wear a size B.