Ajvani Women's Flat Low Block Heel Lace Up Zip Calf Biker Military Boot Size 10 41 Synthetic Rubber sole Shaft measures approximately 15.5" from arch Sizes displayed on the shoe are in UK or EU sizes. US 5 = UK 3 / EU 36 -- US 6 = UK 4 / EU 37 -- US 7 = UK 5 / EU 38 -- US 8 = UK 6 / EU 39 -- US 9 = UK 7 / EU 40 -- US 10 = UK 8 / EU 41 Rubber Sole 3 cm (1.2 Inches) Heel Height 39.5 cm (15.3 Inches) Shaft Circumference 39.5 cm (15.5 Inches) Shaft Height