You can't always go strictly off the gullet size or the bars.
Every saddle will have a slightly different "fit" and every horse is different.
There is no way to predict what saddle WILL fit your horse; you may have a good guess but you'll never know until you try it on.
Also, the saddle may fit when the horse is toned and in-shape but it may not fit when the horse is carrying extra pounds. That makes a difference too.
∞•*˚ Βгįťţαňγ ˚*•∞
It is not enough to know how to ride; one must know how to fall.