I normally wear a 6.5 shoe so after reading the reviews I ordered a 7. This size was still a little snug. When I contacted the seller my only option was to pay return shipping and order another size so I improvised. I wear socks that have cushioned toes so my toes do not rub on the tops of the shoes and I loosened the shoe ties and tie them tightly only at the top. This does not leave much shoe string but it works. The soles are very cushiony and make running less strenuous.