They run small, I wear a size 7 but ordered the size 8 because I know that sandals run small. It is well built and should provide hours of racing fun! Very easy to put on your AirPods case. These would be very comfortable sandals for someone with really thick ankles and feet. I can?t say if it is the size because I bought it for her my daughters Bridal Brunch. I added washers to all the screws (8) that lacked them. Will be seeking a refund. The fit does take a little getting used to though because they are so squishy soft and the heel area is wide and looks long because of the way the heel is designed. A green light means fully charged. As a result my ears would end up hurting slightly after a few hours of use (I use my headphones nearly all day).