8 1/2 Guess Ketchum High Heels in Leopard Taupe

Hi I have a brand new pair of Guess "Ketchum" heels in size 8 1/2. The heel is 4 1/2" with a 1" platform. I wear a size 8 and was hoping these would fit as they were the last size available in leopard, but they were too big. They've sat in my closet in their box since then. Never been worn, still in original box and packaging. They don't even make this style anymore! Bought them online from Bloomingdales a few years ago.