Gosh I just think this is the neatest piece that King Cole do. The sweater to me is just pure 1950's-wear-with-a-circle-skirt vibes. I love it. I really want everybody to think hard about the ease that they want and need here - if you're going for the 1950's vibes then you'll want to make a size or two down but even if you don't want it so tight I do think this will benefit from not being too oversized, it's neat and it deserves to stay neat.
Obviously they show this in a plain colour of the King Cole Cottonsoft DK but I do think it would look very nice in the spotty King Cole Cottonsoft Candy DK. If you want something plainer and warmer, how about Luxury Merino DK?