Online sizing is difficult as all feet are different.
fwiw these were my sizes back in the day before I got fat.
- 8.5E all C&J
- 9E EG 888 & 82
- 8.5E Carmina Rain
- 8 most Santoni
- 8.5 Alden modified & Trubalance
- 9 Alden (other lasts)
- 9.5 Corthay
I find cordovan slightly roomier than calf, even if its the same last & fit.