First, start with some general rules of thumb for proper western saddle fit for the rider:
- Keep in mind that Western saddle seat size refers to rider fit and has nothing to do with how the saddle fits the horse
- There should be approximately four inches between the front of your body and the fork (or swells).
- Your rump should rest on the base of the cantle, but should not be pressed against the back of the cantle.
- Some prefer a tighter fit, some looser. In general, its better to have a saddle a smidge too big than a smidge too small.
All western saddles come with a stated seat size. Seat size simply measures the distance from the base of the horn to the top middle of the cantle. This distance is then expressed as a size in half-inch increments from 12 inches to 17 inches. The following will give you a very general idea of saddle sizes:
- Youth: 12"-13"
- Small Adult: 14"
- Average Adult: 15"
- Large Adult: 16"
- Extra Large Adult: 17"
With a published saddle seat size, choosing the right size saddle would seem to be pretty straightforward. In reality seat size is just one factor determining the fit of a western saddle. Sit in the same size of a variety of different styles and brands of saddles and you'll find significant differences in the fit. You might find that a 14 1/2" Circle Y barrel racing saddle fits well but that you need a 15" in a Dale Martin ranch saddle.
Why the differences?
There are a number of measurements in addition to seat size that impact the fit of a western saddle. These include:-
Seat Depth: Some saddles have deep seats designed to keep you in place during extreme activity and others have shallower seats to allow for more movement.
- Seat Slope: The seat angles from the handhold back towards the cantle and the slope can range from relatively flat to steep.
- Cantle Slope: The cantle can be high and straight or have a slope that is mild or steep.
- Cantle Dish: The cantle can be flat or have a recess or dish in the front side that can be an inch or more in depth.
- Fork Style: There are a wide range of fork styles that can range from wide swells to slick fork saddles with barely any swell.
- Fork Angle: Forks can be straight or angle away from the rider.
Each of these features can affect the way a saddle fits a rider. Unfortunately, none of these other measurements are standardized or published in a saddle's measurements. So, when shopping for a Western saddle, the only way to truly determine fit is to sit in each saddle. Only then will you know if the saddle is a good fit for you.

