Tesla CLSL TF-BK30-KG_Men 7 D(M) Men's Trail Running Minimalist Barefoot Shoe BK30 (Recommend 1/2 Size Up) ? Alert : Choose 1/2 size UP ! We Strongly recommend based on customers feedback ex: usual size MEN 7.5 (D) &gt; MEN 8(D) ? 1 size up for Customer's with wide feet based on customers feedback. ex: usual size MEN 7 (2E) &gt; MEN8(D) **12-20-16 Updated size guide based on customer's comments* Stimulates the rear side of the feet and enhances power and stability of your legs. (Improves foot health and reduces stress levels)