The Aurum mules is the perfect mix of luxury and comfort infused with plush velvet material Featuring a 100 mm crystal heel. 100 mm heel Crystal Detail Square Toe Lambskin Leather lining & insole Made from Plush Velvet Hand Finished - Each pair is hand SIZE & FIT • Runs small, Size Up . If you are between sizes, size up a whole size Calf Circumference: Regular fit is standard fit, fits most with a calf diameter between 13.75" - 15" Slightly Wider fits most with a calf diameter between 15.25" - 17.5" INTERNATIONAL SIZING BREAKDOWN US 5 / EU 35 / UK 3 US 5.6 / EU 35.5 / UK 3.5 US 6 / EU 36 / UK 4 US 6.5 / EU 36.5 / UK 4.5 US 7 / EU 37 / UK 5 US 7.5 / EU 37.5 / UK 5.5 US 8 / EU 38 / UK 6 US 8.5 / EU 38.5 / UK 6.5 US 9 / EU 39 / UK 7 US 9.5 / EU 39.5 / UK 7.5 US 10 / EU 40 / UK 8 US 10.5 / EU 40.5 / UK 8.5 US 11 / EU 41 / UK 9