As a beginner, one should first determine what needs you will be using the gloves for so that you can choose the correct size. Gloves are displayed in ounces (oz.) and the most common sizes are 12 oz, 14 oz and 16 oz. For a general rule, 12 oz gloves are most popular for bag/pad training while 14 and 16 oz gloves are used for sparring. Females usually using 14 oz and males using 16 oz.