You'll be a 13 or 48 in these also. A 13 is a 48 in these, same as your normal, same as a Sidi. They are wider though.
The thing that Country Doc talks about, above, is important. The sizes 11 and 12 are a little large, I am normally a 12, I needed an 11 in these. This was odd, I am never an 11. I also had a few returns from customers in the 11 or 12 sizes.
Finally I checked my EU size on my athletic shoes, some are marked 12 us, 46 EU. My cycling shoes are 12 US/46 EU. But, a 46 EU is an 11 in a Gaerne Balance, and a 12 is a 47. This is not an anomaly, but is toward the large side. Yet, the 9s I sold fit like a 9. 14s I have sold are normal, one was returned as too small.
Basically, I think the sizing in general is mostly normal - I repeat, most sizes are NORMAL, so people should NOT just order 1 size down - but I think the conversions on sizes 11 and 12 are off. I know this sounds crazy, non-linear, non-scientific, etc. But I changed the way I recommend sizes on these, began asking people their EU shoe size, and have had good luck since.
So, I think anyone looking at these should note their US and EU size. May not make it perfect, but it seems to help.