My husband has those very same boots. As soon as I get home from work today, I'll measure for you. Trust me, I know how you feel...I have super large calves and have an extremely hard time finding boots to accommodate them. There are so many beautiful boots I would love to own (namely, most of the knee high styles from Pennangalan), but I can't get even close to buckling the buckles...I need like an extra 3-4 inches.