From Marc Nolan, the Men's Calum Leather Penny Loafers feature: Calfskin leather upper Slip on construction Calfskin leather lining Latex memory foam padded insole Shock-absorbing rubber outsole Imported. Styling Notes: Size 6 to 11 run large, go a full size down. If you wear a half size, size down. Size 12 to 16 run true to size. If you wear a half size, size down. All Marc Nolan shoes are standard D width. Select your true size if you prefer a wider width or up if you a half size.