Maine Woods Mens Jeff Synthetic Imported Boot opening measures approximately 10.5" around Explore your adventurous side in these Jeff boots from Maine Woods&trade;! Combination leather and synthetic upper. Protective toe meets a zipper closure. Padded collar and man-made lining. Man-made footbed. Man-made lug outsole. Imported. Measurements: Weight: 1 lb 6 oz Circumference: 10 1&frasl;2 in Shaft: 7 1&frasl;4 in Product measurements were taken using size 11, width D - Medium. Please note that measurements may vary by size.