Here is a great website with all
kinds of saddles, but most importantly at the bottom of the page is a
link. It says "Expert Advice" and when you get to that site you will
find templates that you can print out that you can then cut out to find out
your horses gullet width and the angles of your horse's back. I believe
there are 15 templates in three different angles with multiple
widths. I thought it was perfect and printed them and was considering
laminating them versus cardboard. Of course, that would cost a bit, but
would come in handy. Good luck and I hope this can be of help to a few
of us.