According to some info I found online, the gullet is 7 inches on this model. I intended to measure this saddle today but it totally slipped my mind. I can get it tomorrow if you'd like though!
It fits Lacey well (fat wide horse), the angle of the bars (too flat) is the only thing wrong with it. I'd figure that if he horse you're trying to fit is a stock breed or built similarly to one, this saddle should fit him/her pretty well. :)
Thanks Annanoel! :)
Fabio - 13 year old Arabian/Lipizzan gelding
Rest peacefully, Lacey.