These are custom-made Mizuno spikes. The right one is 25.75 and the left is 26. The uppers are skeleton design and the soles are X Blast Elite. They do not contain carbon fiber. These spikes are not available for sale. I used them for one season, in the 100m. They are light, so my legs move well. There is no noticeable damage, but they are used, so please understand.