Okay one more question (I'm getting to the end, I promise! Hopefully I'll have it ordered by the end of the week!) And thank you guys all for your help, I really appreciate it!
I'm looking into seats now. According to the calculator thing I used, I'm a 15.5 in Western (I ride in a 17 inch Western saddle, too big for me, so I wasn't sure). So we'll bump that to 16 because half sizes are uncommon.
This following page says on the bottom that if you're a 15-16 in Western, you'll be a 17-18 Aussie. http://www.downunderweb.com/wither.htm
Then, if you look right below that at the Women's sizing guide, my measurements say otherwise. I', 5'4", weigh 125 (Or, at least, I will by the time my saddle gets here!). I wear pants size 4/6. That says I should be a 15-16, so probably 16 to be on the safe side. So, now I have that page telling me I should be a 16, 17, or 18.
So..... Which is it? I'd probably go with 17 as the average of the bunch, but I don't have any tack stores around where I could go sit in saddles, and certainly not Aussie saddles. Or maybe 18, because I was a half size and it's better to be a teensy bit big than small, right? I feel like 16 would be too small for me, even if the sizing guide says so.
Anyone on this thread about the same size as me? What do you ride?