Their body shape, posture, style of walking and so on.
Body frame size can be determined by measuring around the wrist, at the boniest part. The bigger the measurement, the larger the person's body frame.
The two cavities in the heart, known as the atria and ventricles, are part of a larger structure known as the heart itself. Additionally, larger blood vessels such as the aorta, which carries oxygenated blood from the heart to the body, and the vena cava, which brings deoxygenated blood back to the heart, are larger than these cavities. Furthermore, the entire circulatory system, which includes arteries, veins, and capillaries, is also larger than the heart's cavities.
The word "enlarge" means to make larger, or to become larger. A company may enlarge its warehouse to store more goods, or an infection could cause a lymph node in the body to enlarge.When used for images, the word enlarge means to "blow up" or increase in scale so as to display more detail. A photographic enlargement is the same photo in a larger size.
Only the CV series contain numbers on their arm which is Hatsune Miku, Kagamine Rin and Len, Megurine Luka, and the upcoming CV04, So basically, NOT every VOCALOID has a number. The Vocals before Miku did not have a number. Not only them, but the rest after Miku. All of the VOCALOIDs (instead of the CV series) do not have a number around their body. The CV series is just a refresh of Cryptons VOCALOID after they made MEIKO and KAITO.