First of all I have to say dasss the shoe is really super nice, but I probably had the same problem as all other buyers before me. The shoe is viiiieeelll too big! It turns out huge. Actually, I have shoe size 41 and I have the pump specially already ordered in size 40, because I knew that the Airstep Pumps fail big. But the 40 was still too big! Really annoying, the shoe would in fact love to keep. So I had to send him back again.