Speaking of functional purpose, Belstaff coat with RRL cardigan and denim. Functional because it was pissing rain to beat the band when this photo was taken..
Bonus shot of some killer Rios of Mercedes boots that look so fine with RRL denim..
I've done this with probably a dozen shirts because the damn things are so freakishly long out of the box, and I'm 6' tall!! I've never actually looked, but I'd imagine he uses a seam ripper and just takes the tag off.
I think it is very specific to the last. I actually sized exactly same as my Alden TruBalance (Indy) size, but a half size DOWN from my RedWing and most other shoe sizes (which are a 10D) and these fit me perfectly. I would definitely post in the White's thread and ask about the last you are considering to avoid too much trial and error..