Corinna-Maria 925 Sterling Silver Shoe 13.1 Half Marathon Charm MARATHON 13.1 CHARM, LOOKS LIKE THE SOLE OF A RUNNING SHOE WITH THE NUMBER 13.1 ON IT. Solid 925 Sterling Silver. Item is single sided, design is only on the front Approximate size Width 1/4 inch or 6mm Height 5/8 inch or 16mm Comes with an extra Split Ring to give you a variety of attachment options for your jewelry needs