I might anger many people here but I think buying a saddle to fit every individual horse is like buying a car to fit your tires. Saddles of good quality outlast most horses. Western saddles have thick pads under them that can be used to fill in where the saddle doesn't fit exactly. Until I joined this forum I had never heard of buying different saddles to fit each horse.
I rode 20 different horses this year that ranged from a 3yo TB filly that had to stand twice to cast a shadow to a half-draft that was 3 ax handles wide. I used the same saddle on all of them. Some I used two or three pads with and some I only used one. Some I rode all summer and never ruffled a hair and some I would have had to do something different with if I had to ride them longer than a month.
I think the saddle in the picture fits fine although it would be better if you had taken the picture with the pads you planned to use under the saddle. It's like trying on shoes without socks.
There's nothing like the Rockies in the springtime... Nothing like the freedom in the air... And there ain't nothing better than draggin calves to the fire and there's nothing like the smell of burning hair. -Brenn Hill