I'm going to try my best to help people with Sizing as i had a lot of trouble figuring out what to order, and noone locally has these yet.
My measurements. Left Foot = 12.5,
Right Foot = 12
Street shoes = 11 - 11.5 - Patagonia, Puma, Allen Edmunds, etc.
12 - Nike
La Sportiva = Katana Lace (43.5)
TC Pro (44.5)
5.10 = Rock Wrench (12)
Rougue (11.5 - 12)
Evolve = Shaman (11.5 - 12)
I sized the Boostics in a 44.5. They are visually about a half inch shorter than my Katana Lace, but fit with about the same comfort. I could size these down another half size without issue after break in.