Size 39 calf are 17 1/2 inch I barely wore this boots because they are wide calf and as you can se on the photos they are wide. But because they are so comfortable I would wear it sometimes. The bottom of the boots look pretty clean. If you aren’t familiar with the brand DUO They are designed in London and handmade in Portugal. crafted for wider calves using European leathers and suedes. They are a little crease as you can see but nothing crazy once you slide you foot in it looks great.