You may be more comfortable sizing downward for open back models (for example, if you are a US size 6.5, you may want to choose EU size 36). Your heel should be either even with or slightly forward of the back of the clog sandal. Toes should not hit the front of the clog. Dansko’s versatile mary jane, Margrete has an adjustable elasticized ankle strap. High quality leather upper follows the natural contours of the foot. Latigo leather has a smooth, tight grain and semi-gloss to transparent finish. To clean and maintain suppleness, Dansko recommends using a cream polish or neutral wax, and for maintaining shine, use a soft cotton cloth to bring brightness back to the surface of the leather. Instep collar is generously padded. Roomy Thermoplastic toe box provides durable reinforcement and toe protection while allowing toes to move comfortably. Nonallergenic vegetable tanned leather sockliner wrapped around synthetic foam absorbs and evaporates perspiration. Protective Polyethylene heel counter allows the heel to move up and down when walking. Also provides lateral stability and acts as a natural shoe horn. PVC inner frame provides stability and reduces torque and pronation. Polyurethane outsole provides shock absorption and flexibility, withstands surfaces of extreme heat and cold, and protects feet, legs and back during long hours of standing or walking. Rocker bottom propels the foot forward when walking. Dansko Stapled clog outsoles are designed to be suitably slip resistant in workplace environments where excesses of vegetable oils and animal fats are present. Slip resistant tests have been carried out by SATRA, the world’s leading research and technology organization for the footwear industry. Dansko’s Stapled Clog Collection proudly carries the Seal of Acceptance from the American Podiatric Medical Association.Try Dansko’s Karl clog for a comfortable and easy step. Your foot will slip right in to the open-backed design that features thick padding at the instep and a contoured insole with breathable arch support.