I purchased these from the Nike online store. They are 27.5cm. Since the time of purchase, they have been stored in a zippered bag in the closet to protect against insects and humidity. This is a discontinued model. (Includes shoe bag) These shoes are highly recommended for those who want to improve their performance in daily training, competitions, and to break records. The price will be gradually reduced from the current price setting on an irregular basis, so it's first-come, first-served. Thank you for looking.