OK, so I'm going to buy a new saddle Abby and I don't know what size to get her. Since I'm in AZ and she's in AL, I'm getting my cousin to measure her for me. I don't even know how to measure! Lol So do any of you have any good instructions for my cousin?? I looked it up on google and it for everything you need a flexy wire thing of whatever? HELP please!! ASAP!!