I do have a casual button down from the indigo canvas fabric. It's very heavy duty and a bit stiff, so the drape isn't the same as, say, the pale blue oxford. And it was a bit more snug due to the thickness.
I wouldn't necessarily go by the website measurements, no. I will say I usually take a j crew large slim and the large chore coat was snug for me across the chest and shoulders. I got an XL and it was a much better fit for layering.
A great pair of sz 36 Rivet chinos from Epaulet. Never worn, just tried on. The cut just wasn't right for me, so my loss is your gain. These were a limited edition, so there aren't many of them in the world. Great inky hue and should look great year round.