Okay, so the AP saddle the trainer at our stable had that she was going to let us borrow REALLY doesn't fit Aires. It is way too narrow and just kind of perches on top of his withers (doesn't even make it as far down as his shoulders). So, I'm going to have to find a saddle that will fit him. How do I go about determining what size tree the trainer's AP saddle has on it? I know how to measure a western saddle, but have never done an English saddle. I *think* the saddle we were going to use has a wide tree because it is definitely wider than the other AP saddle she has that fits her arab gelding and my friend's arab mare perfectly and I'm pretty sure that one has a medium tree. So, that would mean Aires probably needs an extra wide tree...or maybe even a draft? How common are they in cheap varieties (it doesn't have to be anything spectacular, just something usable until I can afford to get a really nice saddle later on down the road)?