How To Measure Gullet On Western Saddle: A Master Saddler’s Guide To Precise Fit

To accurately measure the gullet on a finished western saddle, find the conchos or screws located directly beneath the pommel (fork) and measure the straight-line horizontal distance between these two points. A standard medium tree typically measures 6.25 to 6.5 inches, while a wide tree measures 6.75 to 7 inches. Because finished leather and fleece lining can obscure the rigid wooden or fiberglass tree underneath, precise identification of these attachment points is critical to preventing severe wither impingement.

Anatomical Prep & Essential Measuring Tools

Understanding how to measure gullet on western saddle trees requires separating the physical dimensions of the bare tree from those of a fully rigged, finished saddle. The gullet is the hollow arch beneath the pommel that sits over your horse's spine and withers. While saddle makers build trees based on raw wood-and-rawhide dimensions, riders must measure completed saddles where layers of leather, wool fleece, and metal conchos alter the accessible space.

Before taking any measurements, you must gather specialized tools to account for the compression of fleece and the curvature of the fork. A standard soft tape measure can sag or curve, leading to false readings that can cause you to select a saddle that pinches the horse's scapula (shoulder blade).

Required Gear and Technical Benchmarks

• Rigid Metal or Wooden Ruler: Crucial for taking straight horizontal line measurements without conforming to the internal arch of the pommel.
• Outside Calipers or Carpenter’s Callipers: Highly recommended for reaching inside the gullet to measure the exact distance between the tree bars.
• Flexible Curve Utility Wire (18-24 inches): Used to take a shape-mold of the horse’s withers for direct comparison against the saddle's interior.
• Manila Folder or Heavy Cardstock: For transferring the wire shape to a paper template.
• Felt-Tip Marker: For marking reference points on the template.
• Saddle Stand or Padded Sawhorse: The saddle must be held completely level and stable at waist height; attempting to measure a saddle resting on the ground or on an active horse will yield skewed data.

Prerequisite Standards

• Estimated Budget: $10 to $30 for basic drafting and measuring tools.
• Time Commitment: 20 to 30 minutes of focused measurement and template creation.
• Core Objective: To identify the precise clearance width and bar angle of the saddle tree, ensuring the tree bars sit parallel to the horse's spinal column without pinching the thoracic trapezius muscle.

Step-by-Step Western Saddle Gullet Measurement Protocol

Measuring a finished western saddle requires a systematic approach to bypass the soft tissue (fleece lining and leather skirts) and locate the structural tree points underneath. Follow these steps to obtain a precise measurement.

Step 1: Position and Stabilize the Saddle

Place your western saddle on a sturdy, level saddle stand. Ensure the saddle is sitting square on the stand, exactly as it would on a horse’s back. Do not allow the saddle to tilt forward onto the pommel or back onto the cantle, as gravity will shift the angles of the skirts and make internal access difficult.

Step 2: Locate the Reference Conchos

On a finished western saddle, the tree's gullet width is traditionally measured from "concho to concho." Locate the metal conchos (often decorative silver or copper discs) on the outside of the pommel, just below the fork swell.

1. Reach underneath the fleece lining directly behind and below these conchos.
2. Feel for the hard, rigid tips of the wood or fiberglass tree bars.
3. Locate the metal screws or rivets that secure the conchos through the leather and directly into the tree. This is your primary measurement plane.

Warning: Do not measure the external distance between the outer faces of the conchos. You must measure the interior clearance width at the exact horizontal plane where these screws penetrate the tree bars. Measuring the external leather will result in an overestimate of up to 1.5 inches.

Step 3: Take the Horizontal "Concho-to-Concho" Measurement

Using your rigid metal ruler or a pair of calipers, span the interior of the gullet from left to right.

1. Align the zero mark of the ruler with the inside edge of the leather lining directly underneath the left concho screw.
2. Extend the ruler straight across the open span of the gullet to the corresponding point on the right side.
3. Keep the ruler perfectly horizontal. Do not bend or curve the ruler upward into the arch of the pommel.
4. Note the measurement to the nearest 1/8th of an inch.

Pro-Tip: If the fleece lining is exceptionally thick or uncompressed, press the ruler firmly through the wool fibers until you feel the solid stop of the leather-wrapped tree bar. This eliminates fleece loft from your final calculation.

Step 4: Measure the Gullet Height (Clearance Depth)

Width is only half of the equation; you must also determine if the gullet is tall enough to clear your horse's wither spine.

1. Hold your rigid ruler vertically, perpendicular to the horizontal plane of the saddle.
2. Place the top tip of the ruler at the highest interior point of the hand-hole (the apex of the gullet arch).
3. Read down to the point where the underside of the fork meets the top edge of the gullet’s fleece lining.
4. A functional western saddle requires a minimum of 2 to 3 inches of vertical clearance here when placed on the horse with a rider's weight in the seat.

Step 5: Map the Wither Angle with a Wire Template

To verify if the measured gullet width matches your horse, you must create a physical template of the horse’s withers.

1. Shape your flexible curve wire over your horse's withers, precisely three fingers (approximately 2 inches) behind the rear edge of the scapula.
2. Press the wire firmly down so it conforms to the exact slope of the horse's shoulders and spine.
3. Carefully lift the wire without distorting the shape, lay it flat onto a piece of cardboard, and trace the inside curve with a marker.
4. Cut out the shape to create a negative template.
5. Slide this cardboard template into the gullet of the saddle at the concho line. The template should rest flush against the fleece. If there are large gaps at the top, the gullet is too narrow or high; if it pinches the sides before reaching the top, the gullet is too wide.

Western Saddle Tree Specs & Gullet Sizing Matrix

The table below provides standard industry specifications for finished western saddle gullets compared to raw tree measurements. Use this data to categorize your findings.

Misleading Measurements & Saddle Fit Troubleshooting

Even with careful measuring, disparities between nominal sizes and physical fit are common. Below are the most frequent structural mismatches encountered when measuring and fitting western saddle gullets, along with their root causes and actionable remedies.

Wither Soreness Despite Correct "Concho-to-Concho" Measurement

• Root Cause: The gullet width measurement matches the horse's width on paper, but the bar angle or twist of the tree is too steep. When the bar angle is too steep, the bottom edges of the bars dig into the horse’s spinal muscles, causing pressure points and forcing the saddle upwards, which actually reduces spinal clearance.
• Actionable Fix: Measure the angle of your wither template. Compare it directly to the angle of the saddle's bars underneath the pommel. If the saddle bars flare outward at a steeper angle than your horse’s shoulders, you must transition to a wider bar classification (e.g., from SQHB to RQHB) even if the nominal gullet width is identical.

The Saddle "Bridges" and Locks Over the Shoulders

• Root Cause: The hand-hole width is adequate, but the tree lacks enough "flare" at the front of the bars. This prevents the horse’s shoulder blades from sliding freely backward under the front of the saddle during motion.
• Actionable Fix: Select a saddle built on a tree featuring "front flare." Use your hand to feel under the front of the saddle skirt while the horse is standing. If you cannot easily slide your fingers between the saddle bar and the horse’s shoulder, the tree's front bars lack the necessary outward curve, requiring a different tree design or brand.

Severe Rocking or Side-to-Side Slippage

• Root Cause: The gullet measurement is too wide for the horse’s skeletal structure. The saddle drops down too low in the front, resting directly on the sensitive spinal processes of the withers and lifting the rear of the saddle off the horse's back.
• Actionable Fix: Check the vertical clearance. If there are fewer than two fingers of space between the top of the withers and the gullet arch when a rider is mounted, the gullet is too wide. Remedy this by moving down a tree size (e.g., from FQHB to RQHB). Do not attempt to fix a significantly oversized gullet permanently with thick padding, as this only masks the pressure and causes instability.

Frequently Asked Questions

Is gullet width measured from the inside of the fleece or the metal tree?

Gullet width must be measured from the solid structure of the tree itself, not the uncompressed wool fleece. To find this on a finished saddle, locate the metal concho attachment screws on the underside of the fork and measure between those rigid points, pressing through any thick fleece loft to ensure accuracy.

Can I change the gullet size on a western saddle?

No. Unlike some modern English saddles with interchangeable gullet plates, a traditional western saddle is built around a solid wood, rawhide-wrapped, or fiberglass-molded tree. The gullet size is fixed permanently during the manufacturing process and cannot be altered without completely stripping the leather and rebuilding the saddle on a new tree.

What is the difference between gullet width and bar angle?

Gullet width is the horizontal distance between the two fork points at the concho line. Bar angle refers to the slope of the tree bars relative to the horizontal plane. A saddle can have a wide 7-inch gullet but a narrow, steep bar angle, which will cause pinching along the sides of the spine. Both metrics must align with the horse’s anatomy.

How many fingers of clearance should a western saddle have over the withers?

A properly fitting western saddle must maintain at least two to three fingers of vertical clearance (approximately 1.5 to 2 inches) between the top of the horse's withers and the underside of the pommel. This clearance must be evaluated while the saddle is fully girthed and carrying the weight of a mounted rider.

Optimize Your Horse's Performance with the Perfect Fit

Ensuring your horse's saddle fits correctly is the most effective way to prevent chronic back pain and behavioral resistance under saddle. Take the time to measure your horse with a wire template today to guarantee your next saddle investment supports their long-term soundness.