I don't know about the saddle size, but Dover Saddlery is a site that will have pretty good prices on any English thing that you need for your horse or you. Here is a checklist for the things I personaly can't ride without, but if you don't want to have to buy a lot of things you can just get jeans, paddock boots, and a helmit.
.long riding socks
For Your Horse
.saddle (i'd get a used one to start off with)
Last edited by horsegirl123; 01-07-2009 at 08:46 PM.