Question for those who have shell tassel loafers on aberdeen last. My suede and calf tassel loafers on aberdeen last fit me fine, in fact, I love the suede version and have multiple pairs. However, shell version was too lose in the heel and I'd have a heel slipage. So I went half a size down but then they were too short and uncomfortable. Will the heel slipage go away once I break in the shoes or am I out of luck with the shell tassels?
I probably would have gone down a width instead of down a half size. The Aberdeen last is too cramped in the toe box for me to contemplate dropping a half size.
I'm not sure about the heel slip, but it sounds like you might want to give a narrower width a shot assuming you haven't worn them yet.
Also, you're experience supports my feeling that shell shoes fit about a half width larger than the same shoe in a different material.