Measure your hand (from the bottom of your palm to the tip of your middle finger) to determine the right size. Most grips come in junior/undersized versions for hands that are smaller than 7 inches, standard sizes for hands between 7 to 9 inches, midsized for 8 to 9.25 inches, and oversized or jumbo for anything about 9.25 inches. Some brands also make women-specific models.