Ajvani Women's Slim Calf Mid Heel Zip Stretch Gusset Riding Boots Size 6 37 Synthetic Synthetic sole 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 Distressed Effect Synthetic Leather 4.5 cm (1.7 Inches) Heel Height 36.5 cm (14.3 Inches) Shaft Height 34 cm (12.9 Inches) Calf / 37 cm (14.1 Inches) Shaft Circumference