Alexandre Birman's Gisel mules are crafted of tortoise-print leather. Open toe Slips on Leather upper Leather lining Leather sole Imported SIZE Heel: about 1.75" (45mm) Please note:This brand fits slightly smaller. Consider ordering a half size up. Women's Shoes - Designer Classics > Alexandre Birman > Saks Fifth Avenue. Alexandre Birman. Color: Nut. Size: 7.