Size recommendations are based on a digital 3D analysis and empirical study conducted for all our own shoelasts streamlined with an inteligent best-fit algorithm.  Please bear in mind that our size recommendation is only good for the shoe category that you are designing. Understandably, fitting among different shoe categories might differ. For any other shoe style size recommendation, please go back to designing section, select new shoe model, access the online size calculator tool and check your size again. Also please bear in mind that difference in shoe sizes measurements is often as small as 2mm (1/12 inches) so your foot measurements will need to be equally detail-oriented to be effective. Please ensure you measure your feet following strictly instructions shown in help guide. It is best to measure your feet after a full day of walking because exercise can slightly increase the size of your feet. Measure both feet; most people's feet are slightly asymmetrical. Use the measurements from the larger foot. Information contained here is intended as a general guide only. Size recommendation by our online size calculator tool entirely depends on how accurate the actual foot measurement is. We can only aim to provide you with the best fitting size based in our digital and empirical studies and the measurements you provide. For a perfect fit, please use any of the size try-on sets that are available.