I ordered these for my brother's wedding. My mom and I are both wearing different size heels, and when we measured them for sizes according to the websites instructions, we were happy to find that my heels were the Super Skinny size and hers were the Xtra Small... and they both came in 1 pack. They arrived today, and I just tried them on the shoes. Based on the measurements, they should have fit. Unfortunately, the Super Skinny was way too small for my heel... it didn't even go in. However, the XS fit just fine. Needless to say, XS didn't even come close to fitting on the heel of her shoe, even though we measured according to the instructions. I just ordered another pack, a size up... and that's fine, they'll get here in time for the wedding... but it's frustrating because we measured correctly and the product came up short.