Your heel should lift up and down with every step so if you are a half size you may be more comfortable sizing up (for example if you are a US 7.5 you may be more comfortable in an EU size 38). Dansko's flagship classic for all-day support and unmistakable style has taken on a critical roll of providing comfort to those in the nursing hospitality and other occupational fields. Available in a variety of high quality leather uppers that follow the natural contours of the foot. Cabrio leather is ideal for the workplace environments with wet acidic or greasy conditions. It has a smooth clean finish with the natural irregularities removed. It is the easiest leather to maintain and can be wiped clean with soap and water. Instep collar is generously padded. Roomy Thermoplastic toe box provides durable reinforcement and toe protection while allowing toes to move comfortably. Non-allergenic 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. Dansko Footwear Size Chart Measurements: Heel Height: 2 in Weight: 1 lb 6 oz Platform Height: 12 in Product measurements were taken using size 45 (US Men's 11.5-12) width Regular. Please note that measurements may vary by size.