When measured on the brannock I was very close to an exact 9D. Here are the AE's I've tried on: 5 Last ( Park Avenue, Strand, Mcallister ) = 9D is the closest, but runs a little long and a little narrow. 8.5D was too narrow, but length was good. 8.5E and 9E were too wide. 2 Last ( Players shoe, San Marco, Lombard, etc) = Tried on 9D only. Was shockingly narrower than the 5 last even though the 5 is described as narrower. At least 3-4 other people on dappered.com agreed that this was a narrower shoe. 1 Last ( Bayfield boot, Leeds, Dalton boot, Bradley, Malvern ) = Tried on 9D. Overall felt just a touch long and wide, but good enough that I wouldn't try another size. I'm also finding that the thickness of socks I wear make a considerable difference given how narrow these shoes tend to run. Hopefully that helps a bit. I really need to try on the 7 last (macneil) and 8 last (delray, lasalle). Anyone know how those compare?