Would you like to know whether the long boots you have in mind will fit around your calves? Compare the circumference of your calf with the shaft width of the model in question, in the size you want.
How do I measure my calves?
Place your foot flat on the ground and measure the circumference of your calf, at its widest point.
Tip: it is best to measure in the afternoon or evening. As the legs may swell a little during the day, new boots with the right shaft width will still be comfortable in the evening. If necessary, round up the measured value to the next whole centimetre.
Tip 2: Be sure to repeat the process for the other leg too, as differences in calf circumference from leg to leg are quite normal. Always go with the highest number when buying boots.