Join Date: May 2011
Location: Chino Valley, AZ
I was always taught that you need to be able to slip your hand in between the tree and their shoulder for it to fit properly. Also, you should have something like three fingers-width of clearance between their withers and the pommel of the saddle with you in the saddle.
Best way I've found to tell if ANY saddle fits is to lunge them up to a sweat while wearing it and check their sweat pattern. No dry spots=good fit. Dry spots=run away screaming. Obviously, if you're buying new, this isn't an option, but I've never bought a new saddle in my life, so...lol
Also, some horses will let you know right away if they don't like the way the saddle fits. My old gelding was good about that. I put a cordura saddle on him once and he was a complete jerk with it on (luckily I only lunged him in it, didn't try to ride). When I was lunging him, he was bucking AT me (which he knew was an absolute no-no) and kept darting out to the end of the line, trying to get away. When I got back up to the barn, I told my friend "This saddle is a definite NO!" When she asked why, I told her what had happened. When we took the saddle off, sure enough, there were two dry patches on his shoulders. That being said, other horses aren't as picky about saddle fit, so it might be harder to tell just from their behavior.
If you're buying new, the best idea is to get a withers tracing of your horse. Most companies will let you send in the withers tracing and they'll match it to the size tree your need. Or, if you're buying from your local tack store, take the withers tracing with you (on a piece of cardboard) and check it against various saddles you're interested in.
Do not tell me I can't...because I will show
you that I can.