This is how you measure your wrist circumference: Measure at the desired point so that the measuring tape fits skin-tight (do not pull hard). Now you can read the correct size using the size chart. If you are between two sizes, choose the next size up. If you don't have a tape measure, you can place a piece of string/thread or a strip of paper around your wrist and mark the point where the two ends overlap. Last but not least, place it on a ruler or ruler so you can read the measurement.