How do you correctly choose the size of the 610 C brace? — Armrest (supporting) size 3 610 C - 3

According to the Russian description of the card, size 3 corresponds to a forearm length of 34–40 cm. The card does not describe how to measure or what to do on the border of the range.

General information (not a manufacturer's instruction): forearm length is usually measured with a tailor's tape from the crook of the elbow to the wrist with the arm relaxed; the brace must not squeeze, rub or impair circulation. If the arm is swollen, or after an injury or surgery, it is better to check the size with the treating doctor or an orthopaedist.