Emily, I'm smallish too and I love the WTB Rocket V on my Racer X. It's narrow and altogether minimal. It's easy to get my butt behind because it is so narrow, yet I find it very comfy for seated riding. It may be the "whale tail" cradling my behind! It's realtively inexpensive (unless you get the fancy-schmancy one). If you were close by I'd let you test drive mine!