Girl X asked a question the answer to which contains partly what I also wanted to ask about and I was inspired by NYFW posts.

For those who have missed it, you can check this thread.

The bit I'm refering to is:
I will never buy a coat or jacket unless it fits my shoulders in precisely the right way. But as I said earlier, I am happy to adjust the alignment of the buttons.

Angie, what is (your) perfect coat fit?

I am particularly puzzled after seeing that your red coat fits over your leather jacket. Do you size up with coats? Do you buy them bearing in mind what you'll be layering underneath.