The Fitz is most like the Aberdeen. I wear a 10.5 in the Aberdeen, 10 in the Barrie, and a 9 UK in the Fitz. Many others would probably wear a 9.5, but Carmina's Forest and Rain are both 9 UK for me. The 9 in the Forest is snug, but a 9.5 would be too large. I think the way the correct size Carminas fit relative to Alden is very different. Carminas are a closer fit, whereas Alden is more voluminous.