My wife, an avid runner, used to frequently borrow my running tops because women's running tops tend to be too form-fitting for her (she's 5'4" and a slender 115 lbs and can easily fit into any women's running gear sized S or M but she prefers just a little breathing room which women's very form-fitting running gear just doesn't provide). With winter upon us, I was looking for a lightweight jacket with decent thermal protection and decent aesthetics. While I wasn't specifically seeking a biking jacket, this one turned out to be exactly what I was looking for because it is cut with a little extra room in the upper body (to accommodate the lean-forward biking position). Additionally, she wanted a little extra cover over the lower back area and this jacket has this (I guess you'd call this a butt flap where the back half of the jacket is cut a bit longer than the front half). I bought a size medium which is pretty much the size she prefers but she'd likely fit just fine into a small (but medium gives the little extra room she wants). Notwithstanding the comfortable dimensions, the jacket still has a form-friendly cut with tapering in the right places for a woman's body. The sleeves might be a hair long because they are made for biking but this is really a non-issue for her. What's more important is that the sleeves aren't cut so that they are practically skin tight around her arms as most women's running jacket sleeves are. They fit properly, not baggy or loose and not ridiculously tight. The material, stitching, and overall construction of the jacket is just about flawless and it looks great. I'm surprised that the price is this low for this level of quality. Very pleased with this jacket and will look to purchase more from this brand in the future. Highly recommended if you're a woman of any size who'd like a jacket that's easy to get into, doesn't need to be peeled off when you're done with your activities, and still has a flattering cut.