A 41R, but in my experience they run a hair big. So a 42R would fit perfectly in this coat. Made in Italy Golden Fleece for only $55. I will be disappointed if a Forum member doesn't own this by midnight tonight.
Against my better judgment, I bit. Seller sent me some more pics, they were v. cooperative - I guess they get genuine outlet type stuff, not just 346 factory store merch. That's just too cheap for a miser like me to pass up. If it truly is too tight I usually wear 42r - it'll pop up here. I also think it's likely not part of a suit. Content tag says it's part silk, and I have a hard time imagining BB doing pants in a silk herringbone windowpane. If only it weren't single vented... As for the suit link I posted earlier, I think that suit is pretty damn old, but it is kinda cool. I'm not buying it
It was 1" too long, otherwise I would have bought it. I'd agree that it's not part of a suit-due to appearance and fabric. Very versatile, and you know you stole it. Hopefully, this will take some of the sting out of losing the Isaia auction.
I actually like to wear navy suit jackets with odd trousers, I prefer the buttons to not be brass, which are quite common in blazers, especially ones from BB. One outfit that I've used quite frequently is a navy with royal blue windowpane blazer by Belvest, with a black/blue bengal striped express premium shirt, I think it looks quite good with black pants/shoes.