The human body has different sizes and the fit in these sizes can help us determine the best physical condition. In fact, all physical circumferences should be appropriate based on the physical condition of each person, and if this proportion is maintained, then we can say that we have an ideal body with it. McCallum is a method in which only by knowing the circumference of the wrist, one can find out the ideal circumference in other parts of the body. To make your work easier, we have prepared a special calculation for this purpose, which you can see below. Using this online calculator will make your work easier.