IF (purely hypothetically) this was Canyon, I would be a bit surprised, simply because their sizing is odd in the other direction. I fit a 54 or 56 Trek Domane or Emonda, and Canyon not only points me to "small", but in their on-line fitting web interface, I have to lie and claim my legs are 1" longer even to get it to recommend a size small. Otherwise it tells me something must have gone wrong, and I cannot possibly be 5'9.5" with a 30" inseam. (I've demo-ed their bikes, and could fit both small and medium with no drama.)