The following are the measures. Taking measurements is very simple:
choose the section to be measured;
see from the picture the letter of the section and the distance to be measured (represented by colored line), compares the desired section sizes and compare them with a boss who uses (only way to not get it wrong size)
found in the attached table of measures, the measure in centimeters;
play it! you're ready to buy!
Choose your size and take the measures required under section: