I'm 5'9, 153lbs, 28" waist, small bust –– I initially purchased a small and the arms were much too tight, had to exchange for a medium, and I'm so glad I did. I love this jersey. Perfect for early morning chill, cooler Bay Area days, and single layer evening rides. I was wearing this jersey when I took a bad spill on the China Camp trails last week... came down hard on my right arm... elbow was busted, jersey was fine! I honestly think the weight of the fabric saved me from what could have been a much worse outcome. Anyhow, couldn't recommend this jersey enough, almost makes me wish the colder days would sick around (almost).
These are snug and are great for chilly days here in New England- I own both colors-My only complaint are the arms are short showing lots of wrist- which makes me hesitant to buy the other long sleeves. Other than that the fleece liner keeps me warm here in the Northeast and I just wear longer gloves ;)
I really love the material of this jersey, it wicks well and keeps you dry on those slightly chilly days when you need to be warm but also want to do some climbing. This ran a bit smaller than I was hoping, felt a little bit tight in the shoulders, and I kind of wish that I had ordered a size up due to this tightness and the length is just a touch short. Overall, it's a beautiful color and well made jersey.
I know some reviewers have commented on this jersey feeling a lot snugger, I don't really agree. It's a slightly less stretchy material, so initially putting it on felt like it had less give, but after wearing for even 5 minutes, I would say the fit is very similar to my other long sleeve jerseys. And, I love it! It's remarkably warm for how then the material is. And as always, the perfect on the bike length. My only qualm, is the tiny pockets! They are more narrow on this jersey for some reason. I also wish (all their jerseys) had a little zip pocket for keys.