It's slightly trimmer than other RRL sweaters. I sized up from XS to S, and the S fits fine.
The weather in SoCal had been cool enough in the last few days, so I finally got the chance to wear mine. Got many compliments (mostly from extended family members because I was housebound at their homes as we were under mandatory evacuation because of the Silverado fire). I also got compliments from a couple of their neighbors when I walked the dog so it wasn't just family members - LOL.
The sweater isn't as warm as my other wool cardigans, but it is definitely warm enough in the 60 degree range. The cotton/silk combo is very nice on the skin (I wore it once with the cream Hawaiian shirt and once with a white T-shirt). All my other wool RRL cardigans are slightly itchy.
Highly recommended if you can find one.