How do I choose the right saddle for both my horse and myself?

Saddle fit is a dual-sided problem that affects both the horse and the rider, and a saddle that fits well on the horse but poorly on the rider — or correctly on the rider but poorly on the horse — fails at its fundamental purpose. The most common approach to saddle fitting addresses both sides sequentially: first ensuring the saddle fits the horse correctly, then confirming that the rider can sit in correct balance. The saddle's fit on the horse is evaluated primarily through the tree's width and angle relative to the horse's shoulder angle and back width. A tree that is too narrow sits high over the withers with the bars digging into the muscles alongside the spine; one that is too wide sits low and allows the pommel to contact or nearly contact the withers. The bars of the saddle should make even contact along their length without bridging in the middle or rocking on a high point, because uneven contact creates pressure points that cause pain, resistance, and over time muscle damage. Panel flocking or foam fill affects how the saddle's weight is distributed across the bars' contact area, and panels that are unevenly filled or compacted create pressure concentration that a correctly fitted tree cannot compensate for. A saddle fit evaluation by a qualified saddle fitter includes assessment of the panel contact rather than only the tree width. The rider's fit in the saddle is evaluated by the seat size — whether the rider's seat bones land in the widest part of the seat with appropriate space in front of the pommel and behind — and the balance point of the saddle, which determines whether the rider can sit in a neutral, centered position without being tipped forward or backward.