Only worn for one very brief treadmill run. Decided they were a bit too big on me so I bought another pair half size down. Would probably fit someone that’s a size 12 in my opinion. I don’t have the size 11.5 box but will ship it on the box from my size 11 replacements. Practically like new condition. PayPal or Venmo preferred. Buyer is responsible for fees if they choose good and services payment.