C.T.
Leggings are the way to go. Wear them with warm socks and boots in the winter. You can get them at so many places...Old Navy, Gap, Kohl's, JCPenney, Lands End, Forever 21, Sears. Any clothing store basically. Tights are not warm enough. Specialty outdoors clothing stores even make really thick warm winter leggings with a wool blend (that are soft) for very cold days. Leggings are really in right now. Go have her try on different sizes/brands to see what will fit her best. Some brands run narrow and some run wide so you just have to find what works best for her. PS - If her leggings fit her waist but are too long you can hem them. If they are too big in the waist then you should alter the waist so they fit better and stay up. I have to alter the waist of all my daughter's clothes because she is very narrow. Hannah Anderson is huge (wide) on her. Old Navy, and Gap seem to fit her a bit better.