The size you need depends on two important factors which are determined by your personal hand measurements. These are your hand length (measured from the tip of your middle finger to the base of your palm) and your hand circumference (measured around your four knuckles). To determine which size is best for you, simply measure both of these areas in inches to get a starting point. Unfortunately, there's no way to measure glove size without actually trying the gloves on. This means that if you measure your hands and find that you're in-between sizes, or you just want to try a few different pairs to see what fits best, the only way to do this is by trying them all on. For small hands, it's always better to err on the side of caution and choose a smaller size than one that will be too large. This is because smaller gloves are less restrictive, allowing you to make a wider range of movements with ease. You'll also have more surface area on the inside of your glove which acts as an added layer of protection for your sparring partner's face while grappling.