if looking for a snug fit on barrie chukka, size down one full size from tts and up 1 width. i am a tts 12d and a 11E barrie chukka fit best. otherwise picture yourself rolling with the cordovan waves but as alc eluded to, many prefer that look
Wish I had known this when I purchased mine. They were my first new Alden shell purchase and I went the traditional 1/2 size down. I love the chukka and the 2-eyelet design is a nice feature for me, certainly not a liability. Depending on the socks I wear, I may throw an insert in the shoe but other than that, I love them and wear them all the time.