First, the sizing listed, like the prices, are based on your location. So if you are seeing US $, then you are likely seeing US sizes.
Second, I've tried only one pair of CT shoes, the black brogue monk straps, and they were huge. I wear 8.5 E in pretty much any maker that offers them, and if not, I go with a 9D. With the CT shoes, however, I was swimming in 8.5 D. The toe area was very flat (for me) and generally uncomfortable compared to my Aldens, AE's, and Barkers. If you're near NYC, the store on 7th ave carries a few models.
Finally, although there's agreement on here that some of CT's shoes are basically Loake 1880's, it's hit or miss. You have to look at the specific model to determine quality.