I purchased these from the Nike online store. They are 27.5cm. Only tried them on indoors at home. Since the time of purchase, they have been stored in a zippered bag in the box in the closet to protect against insects and humidity. This is a discontinued model. These shoes are optimal for jogging and recovery. They can be used for running, jogging, the gym, daily commutes, and more. The price will be gradually reduced from the current price irregularly, so it's first-come, first-served. These are very popular items, so they may sell out quickly. Please understand that these are items that have been stored for a long time. Please refrain from purchasing if you are concerned about minor details. Thank you for looking.