I bought this for an upcoming 4 week trip to Europe. I'm bringing only a carry on so I needed something neutral, quick dry and will pack small. This top is just adorable in the picture but it fits me a little baggy. I'm 5'4" 140lb with wide hips and average top, so clearly my shape is not as slender as the model's. I bought a medium. I'm very leery about wool because I itch even if something is only 10% wool, but people have told me Smartwool doesn't it. Not so, at least not for me. I bought a black V-neck Cuddledud to wear underneath. The Cuddledud shows a little in the neck, but I don't care. I wore it to work and it didn't itch, so I'm keeping it. I really like the look of this sweater.