I'm 5'4" and weigh 125lbs with 34D. I normally wear a women's small but ordered a medium because so many comments said to go up a size. It fits just like the picture on the model. I absolutely LOVE the soft and stretchy material and will be ordering some other colors but I think I will be order a small next time as I like my tops to be a little more form fitting. Having said that, if you want it to be form fitting stick to your normal size, if you want it loose and baggy, go up one size...either will look and feel great!