Size is 27.5cm, unused. I liked the design and kept them with care, but I'm selling them because I no longer have the opportunity to run. Please note that no claims or returns are accepted after purchase. 【Product Information】 Durable and fast, suitable for propulsion training. Train hard and find your rhythm on the road. From the moment you tie the laces, the woven structure wraps your foot, providing a secure fit from start to finish. The design enhances flexibility, providing excellent responsiveness with every step and securing your foot. The soft, breathable upper combined with the stretchy opening creates a sock-like fit and a secure, stable feel. Once you've set your goal, tie your laces and push forward to break your personal best. ・Comfortable fit The stretchy Nike Flyknit material around the opening makes it easy to put on and take off. It fits like a sock and securely holds your foot in place. ・Cool and comfortable The lightweight mesh upper enhances softness and breathability, creating a perfect fit. ・Secure fit Four individual webs that work with the laces support the midfoot. They provide stability with a tight fit when you tighten the laces. Also, the inner heel pod provides a more secure fit than the Zoom Fly 3. ・Propulsion for long-distance runs Nike React technology provides lightweight foam with excellent durability. It creates a smooth and bouncy feel. This is combined with an internal carbon fiber plate to enhance stride flexibility.