I wear leather paddock boots from the local tack shop. The brand is called Tuff Rider. I also wear half chaps (some people call them chapettes.)
You can also get synthetic boots for less $ than leather, and you don't have
to get half chaps. People regularly wear half chaps when they don't have jodhpurs or breeches and they wear the half chaps over their jeans for protection. I do have jodhpurs though, and I just mostly wear the half chaps for comfort.
Usually if you are under
18 you wear jodhpurs and paddock boots, and if you are over
18 years old you wear breeches and long leather (or synthetic) boots but it doesn't really matter in my opinion.
You can also get a recommendation from a tack shop if you have one nearby, although I must warn you, the people who work at a tack shop regularly try to get you to pay more or get more than really needed. Although sometimes they can be really helpful. :)
You can also shop online, but you must know your daughter's foot size because it isn't safe if they don't fit right. A good way to break boots in is to put a hockey puck in both of the boots, and leave it in for several hours and when you take them out they should be broken in pretty well.
BTW my boots were about $100 and my half chaps were about $30.
Here are my recommendations: Ladies' Ariat Cobalt-XR Devon Pro Paddock Boots - Dover Saddlery http://www.doversaddlery.com/dublin-...35533/cn/1934/ Victory Canter English Tack & Apparel - Youth Apparel - Breeches - Pull On Jods - Tuff Rider Youth Cotton Embroidered Pull On Jodhpur
(Lol, I love the jodhpurs, they have little horses on the back! This is the pair I have!)
I hope I helped! Good luck boot shopping! :)