The shirt, tie, and pocket square are all from Suitsupply.
This is a regular shirt. I find that a SS "regular" is as trim as a Ledbury "slim fit". A Suitsupply "regular" is fairly trim.
On me, a SS "trim fit" is much too snug. Sadly, not all of their offerings come in both trim fit and regular.
The tie cost $45. Not a bad price.