1) My daughter is a very big 7 year old. She's the size of an average 10 year old, and grows 3-5 inches a year (consistently). I was told to look for a 14-14.5 inch seat for her. The saddle my aunt wants to give her is larger, I'm sure. What are the issues with a seat that is too big, if we can make the stirrups short enough?
2) Because she rides lesson horses and not one of her own, she needs a pretty universal saddle. I think the biggest concern is the width under the saddle horn (forgive my stupidity, I don't know what it's called). What is a good size that I should be looking for there that will fit a wide variety of horses?
3) I am looking for used because (unless I get the one from my aunt) she will outgrow it and I will have to upgrade. Are there certain things I should look for when looking at used saddles?
I'm sure I'll have more questions soon, just wait!