Yes and no. My only prior C&J purchases/try ons involved the 240 last from Brooks Brothers and Marlows from Ralph Lauren. Both were too tight for me in my TTS 12D. Based on this, I went with the 11UK here and suspect I could have gone down another half size. I put an insole in today and that seems to have solved the issue. To the extent it helps, I'm an 11UK in Carmina's Forest, Rain and Inca lasts and these are noticeably bigger.