Prada BOS Sierra heels, European size 37 (US 6.5). Worn twice! These beauties are in excellent condition. The sole is leather as well as the navy part of the shoe, the back of the shoe is black suede, the insets are a light taupe suede and the embellishments are silver. The heel measure 3 3/4 inches. An insert has been placed in the right shoe (to prevent slipping off the heel) but it can be removed. There is an extra set of heel tips included. Note that there is an ink pen mark inside both shoes, as reflected in the photos, which is only visible when not wearing.