I'm short, 5'3" ... I ride with mine about as long as my armpit.......from saddle to armpit...if that makes any sence to you. Sometimes I have to adjust so I can get on.. if its a tall horse...etc.
You gotta find what fits you. :)
I've been told mine are wrong before..worked 4 me tho.
Be strong and courageous, and do the work. Don't be afraid or discouraged by the size of the task, for the Lord God, my God, is with you. He will not fail you or forsake you.