Another important aspect to consider when picking a racquet is the appropriate grip size. If you have a grip that is too small, it can cause you to compensate by using your arm muscles to keep the racquet in place, which could lead to tennis elbow.  To determine your grip size without a racquet, use a ruler to measure from the bottom lateral crease on the palm of your hand to the tip of your ring finger. For adults, it should be somewhere around 4 inches. However, when in doubt, go smaller with the grip because you can always build up to a larger size.