An experienced climber returned the Phantom Pro in size 45 (their street size, US 11.5): the fit felt good and tight, but the big-toe knuckles were in extreme pain, and since the synthetic upper won't stretch much they sent it back.
“I just had to return them in a size 45 (equivalent to my street shoe size 11.5). Everything felt good and tight however my big toe knuckles were in extreme pain.”