I have never worn a size 11 but that is what fits in this style. There was also a cut in one of the sandals rubber. They are comfortable, but they do make my ears really hot! This is all around an excellent product! The cord is too short to plug it in to charge and not have an extension cord on my chest. The non slip tab at the back of the sock helps keep the heel in place and I love that feature. Fits very well and fashionable. The bottle and packaging are IDENTICAL! After hours of troubleshooting, figured out Apple only allows 3 accounts per device and they cannot be wiped even when you reset the device to factory settings. A nice touch is as well as a cloth carry bag you get both 3.