Love these pants when the water is cold but the air temp is too warm to wear my full wetsuit. These are great with a rashguard. Size wise, I am 5'4" and 107lb. I ordered a small, and they fit fine -- I possibly could have done an XS, but sized up like I normally do with wetsuits. They don't fit as skintight as my wetsuit (Roxy size 4) but they are comfortable and stay put, even when wet. I wish I had more pairs of these pants and hope Roxy comes out with a new design this fall/winter.
St. Leonard, MD