Got two of those pullovers, in Sage and Iris. I had one Velma Fleece Dress already that fit me quite well, a bit lose, in M, so I got these in S and they fit almost perfectly. The sizing seems to be the same for both the dress and the pullover, and not far off most brands as I tend to wear S size clothes being quite thin, the arms might be a bit on the narrow side but still my size.
My only inconvenience is that the sleeves are just a bit short, so if I use the thumb holes I end up very tight in the sleeves. I have the same problem with the dress as well. In fairness I have quite long arms, I would need the sleeves to be easily 3 inches longer, but I don't know if this fabric scrunches up as well on the sleeves for people that have shorter arms, so maybe the current length is a good compromise.
I love the colors, and I might not be the only one seeing how fast some of the colors, especially for the dress, were out of stock. I wish some of the lighter or less brown colors were still available for the dress, and I am glad I got the pullovers now before they go out.
The pullovers are perfect for all-day wear, especially as the seasons cool down a bit. I wouldn't wear them too much during summer but they're warm enough to be outdoors comfortably in the fall and winter, but they breathe enough that I can be at work with them indoors without overheating. Just a very good fabric in general, and quite hardwearing, I wear them in the workshop, while biking, while tinkering or just lounging and it just handles everything.