Now isn't that funny. I've got an old 1990s knitting pattern I have a yen to knit now collars are back in fashion, I wonder if it's the inspiration? (The model shot has it quite fitted but I can only find this version online, still beautifully knitted of course). https://ravel.me/tara-cardigan
I love it that these shapes and details are back in style.
OP I would size down for a neat fit in your link. Maybe wear it with a black camisole and dramatic wide leg trousers and boots. At least it's pure merino wool.