I adore Old Gringo boots and have several pair. That being said, I was drooling when I saw this knee high cowboy boot by them. I have always considered my calves regular size and have NEVER had a problem with any boot knee high or thigh high not fitting over my calf (and I have lots of thigh high and knee high boots). That was until this one. I couldn't get that sucker over my calf and my foot barely fit through the shaft of the boot. I would say if you have slender calves (12.5 inches or less) then you will love these boots. Me, well I had to send them back. My calf measures 14 inches at the fleshiest part and I couldn't get close to pulling these over my leg. Oh well, better luck next time.