I bought 2 of these during a 25% sale (otherwise I wouldn't even have considered them due to the price). I'm 5'4", 160 and wear med/large normally in Athleta (I do yoga) and I bought the MED in Pyrite and Snowfall Blue. Right out of the package, these shirts look GREAT. TTS. Loose fitting and eve...n wrinkled they still look classy but casual. You might be able to size down but i wouldn't. I love that the sleeves/cuffs are cut so that they can be easily folded and lie flat without being constricting or bunching on the arms. Personally, I tend to shy away from collared shirts; I have a short neck and open neck tops are more flattering on me. But I work from home and could use comfy, effortless professional tops when I'm on camera. These linen shirts are PERFECT as I can quickly throw them over a tank top and wear open or buttoned. The collar itself is small and fashionable, not so corporate looking. Hopefully after a few washings, the the soft fabric will allow the collar (when buttoned) to "fall away" from my neck a bit so that it's not constricting and boyish looking and give it a feminine, relaxed vibe. This is not your typical starchy, stiff collared shirt. The fit is a bit boxy, but not too much. (I gave it 4 stars since I wish it had just a bit slimmer profile when buttoned). These will be an excellent packable, all-purpose travel shirt and will complement a variety of pants, skirts, or shorts! PS. The Pyrite color is STUNNING.