If boots pinch your calf or leave a gap, the problem is not your leg: it is that almost all of them are made with a fixed shaft and a zip that does not give.
Our boots have an elastic shaft. The fabric stretches as you pull them on and returns to shape, so it fits every calf without squeezing and without gaping, and they slip on and off with no zip. No need to pick a calf size or measure anything.
How much do they adapt? The fabric takes several centimetres of difference in circumference, which is why the same boot works on different legs. Sizes 35 to 42, heel heights from 3.5 to 8 cm, in suede effect and stretch fabrics. Made in Spain.