Sizing on WH Taylor (formerly Coles) shirts

I'm trying to decide what size to order for a shirt from WH Taylor (formerly Coles). I've basically a 16.75 and 36.5, but obviously no shirtmakers make this off the rack. I've had luck with 16.5/37 but am considering moving up to 17/37. WH Taylor offers either 16.5/36 or 17/37. Does anyone with experience with WH Taylor / Coles have any guidance as to whether their collars run small/large or their sleeves run short/long?

Thanks,
Zack

Yes, I've sent this question to them and am awaiting a reply. When they reply, I'll post up the answer here. But just thought I'd ask for any first-hand experiences as well.

Here's what the company had to say:

"You would be clearly better with a 17” collar. We have had comments that the collar is smaller than competitors."

Good information and a timely response. Now here's to hoping I enjoy their shirt as much as their customer service.