I too have just picked this baby up and am very happy indeed.
Size wise,I wear XL in everything IH and went with the same for the Pea Coat.As Giles says,the sizing is a touch more relaxed than usual,so there's room for a layer….If i was looking for a more vintage fit,i probably could have even sized down to an L,but the shoulders are spot on and I'm very happy that i can fit a decent sweater underneath...it's a winter coat after all.
I've had a few peacoats and this one is very special indeed...i was looking for a new coat as my vintage one was getting a hammering and it's 53 years old now!! the search is officially over.
This one is exactly what i was looking for.

Def 36…i have the 634SR in a 36 which are comfy but on the border of tight.
As Rocket said,the 25oz just give you a touch more breathing space..they were spot on straight away.

I've always been a Brady Bags man but looks like i'll be a Chapman convert pretty soon…

These arrived yesterday and i'm in them as i type.Fantastic quality as ever.
I really like the cut of these..as has already been said,they're a true 55,sitting higher than the 634 on the waist - mine are getting close to belly button level - which may not be for some but i really like that style.
Only on day 2 but they certainly live up to expectation so far.I'll have a go at fit pics at the weekend…there seems to be a distinct lack of photographic evidence that they're out there...

Oh dear…these and the IH634 raw on the way...at least they're 'extant' and give my wallet a chance to catch up,esp with the cord type III round the corner.

I asked the same question when i got mine,pre or post hemming…took Giles' advice,pre..and they shrunk to the perfect length with roping.

Wow..this makes my Levi's white tab look like it's made from paper!
I think it's fair to say i've been waiting for this jacket..and no side pockets …how it should be...perfect.

Like the double buttons on the pockets of this new version…

Very sad news…listening to Winter in America as I write this...classic stuff.
RIP.

Def on for a pair of these when they arrive.