These boots are lightweight, comfortable, and very warm. They quickly capture body heat, and hold it in. I love the high shaft, keeping my legs warm from knee to toe. Though quite roomy, I would say they are true to size. They have room enough to wear over a pointe shoe or a slipper, etc. I highly recommend these boots. I even wear mine around the house on cold days. I am a size 5-6 and I ordered the small.