Thanks to BWV, I just landed a pair of #8 slip-on chukkas on the Plaza last, from LS at a great price. Will be in my hands and on my feet in a few days. But now to play the Alden sizing game. I have been at this for a while, so I have almost everything covered. This one is new for me. I wear 9.5 in Plaza tie shoes and boots, 9.5 in Aberdeen tie shoes and boots, but 9 in Aberdeen slip-ons. My best Plaza size is probably 9.25; I think the last runs a sminch big. How secure on your feet are these slip-on chukkas? Which size, 9 or 9.5, is the question.
All I can share is my experience from wearing these a grand total of one day, but here goes. Plaza fits me very well. I got my typical Brannock size, and for my feet they don't run big at all. A bit snug in the forefoot and toe box, actually, but the good kind of snug. The chukka is definitely loose around the mouth of the boot, which is to be expected for this kind of design. The only thing that was slightly disconcerting at first is that my heels would elevate away from the insole a bit with each step. After a few minutes, though, I found that I adapted by walking with less sloppiness, if that makes any sense. By the middle of the day, the relaxed fit felt very natural. I could see this kind of fit being a deal-breaker for some.
On a somewhat-related note, I'm enjoying how leather-soled shoes in general make me walk more deliberately. I've spent most of my life on shoes that allow you to get away with all kinds of sloppy walking.
Anyway, congrats on the score, and I hope you like yours as much as I like mine.