One of the primary reasons for foot ulcer formation, as a main risk factor for amputation in people with diabetes, is sustained high plantar pressures. The loss of sensation (diabetic neuropathy) associated with diabetes progression makes adequate footwear fit essential to redistribute high PPs and to eliminate high friction areas that would likely induce repetitive trauma. Furthermore, there is a need to establish a biomechanical definition for fit for people with diabetes and to determine if there are differences in foot shape between people with and without diabetes.