Josef Seibel Women's Sz US 6-6.5 EU 37 Black Fiona Ballet Flat Comfort NEW Slingback Comfort flats Leather Upper Synthetic soul Slingback fit Simple minimalist design See size conversion chart New with box. Box has slight damage. Thanks for shopping! A simple ballerina for everyday use by Josef Seibel. With the high-quality material and its timeless design, the shoe will become a loyal companion. The clasp made of crossed textile bands sets an optical accent and provides an ideal grip. The soft sole supports the running movement of the foot and thus brings a comfortable wearing experience.