the quicksaddle fitting guide
Start With the Basics: Fit, Comfort, and Movement
Proper saddle fitting is the process of matching the saddle’s structure to the horse’s anatomy to protect comfort, movement, performance, and long-term musculoskeletal health. A correctly fitted saddle distributes weight evenly, avoids pressure points, and allows natural shoulder rotation and spinal freedom. As a baseline rule, the saddle should provide vertical clearance at the withers and rear channel and sit in a balanced, non-restrictive position.
Horse fit checks (placement, balance, gullet, panels, length, girthing, tree fit)
Shoulder Clearance and Placement
Correct saddle placement starts at the shoulder. The front of the saddle should sit 2–3 fingers behind the scapula (shoulder blade) to allow the shoulder to rotate freely without interference.
Wither clearance is often misunderstood. It is not simply a matter of being able to fit three fingers vertically under the pommel. True clearance must be assessed with the saddle girthed and the rider mounted, as the saddle will settle once weight is applied. The saddle should maintain clearance without dropping onto the withers or being pushed back onto the shoulder during movement.
Poor placement or insufficient clearance can restrict shoulder movement, alter gait, and cause discomfort long before visible soreness appears. Our guide to the horse’s back and saddle fit anatomy explains how the scapula and surrounding structures are affected by poor placement.
Saddle Balance
A correctly fitted saddle should sit level from front to back, with the deepest point of the seat positioned centrally. This allows the rider’s weight to be distributed evenly rather than tipped onto the shoulders or loins.
Achieving correct balance often requires flocking adjustments, and it is normal for this to take time during a fitting. Even small imbalances can create significant problems if left uncorrected.
An unbalanced saddle can lead to muscle soreness, restricted movement, and rider instability. Over time, it may contribute to behavioural issues or physical changes in the horse’s back, making this an area that should never be ignored. These are some key reasons to have your saddle checked by a professional saddle fitter on a regular basis.
It’s worth looking at your horse or pony’s body condition score as fat pockets can have a big effect on saddle balance, and as they change can move a good fit to a poor fit quite quickly.
Gullet and Spinal Clearance
The gullet is the channel running down the centre of the saddle and must keep clear of the horse’s spine and surrounding muscles. For most horses, this means a consistent 3–5 finger width, maintained evenly from front to back.
The saddle must also follow the natural shape of the horse’s back and shoulders. A well-fitting saddle will sit comfortably behind the shoulder blade without narrowing or pressing unevenly along the spine.
Final checks should always be carried out with the rider on board. Pressure beneath the front of the saddle should feel even from top to bottom. Any tight or uneven pressure indicates an incorrect fit.
Many older saddles have gullets that are too narrow, particularly towards the rear. Always look for a wide, consistent channel that protects spinal clearance along the full length of the saddle. If you are unsure whether your current saddle provides adequate clearance, our professional saddle fitting service includes a full assessment of gullet width and spinal contact.
Panel Contact and Weight Distribution
Saddle panels should make smooth, even contact along the horse’s back to distribute the rider’s weight comfortably. There should be no gaps, pressure points, or sudden changes in contact.
Uneven contact can cause bridging, where weight is carried mainly at the front and back of the saddle rather than evenly across the panels. This concentrates pressure and can lead to soreness or muscle discomfort over time. Read our guide on how to spot if your horse is uncomfortable in their saddle for signs that panel contact may be an issue.
Correct panel contact depends on matching the saddle to the shape of the horse’s back. Some horses suit flatter panels, while others require more curvature. The goal is always the same: even weight distribution from front to back.
To check, saddle the horse with the girth fastened and run your hand beneath each panel. Pressure should feel consistent throughout, not heavier or lighter in any one area. Where panel contact is uneven, saddle flocking adjustment can often restore correct contact and comfort.
Panel Length
Saddle panels must not extend beyond the horse’s last rib when the saddle is correctly positioned. Any weight carried behind this point places pressure on the loins, which are not designed to bear load.
The last rib can be located by finding where the hair changes direction at the flank and drawing an imaginary line straight up to the spine. The rear of the panels should sit in front of this line.
This point corresponds to T18, and saddle panels should never extend past it. Respecting panel length is essential for protecting the horse’s back and maintaining long-term comfort. Understanding the anatomy of the horse’s back, including the significance of T18, helps explain why panel length is so critical to long-term soundness.
Girth Strap Alignment
When the saddle is positioned correctly, the girth straps should hang straight down, perpendicular to the ground, aligning naturally with the horse’s girth groove. They should not angle forwards or backwards once the girth is fastened.
If girth straps are incorrectly positioned, the saddle will move to wherever the girth can hang vertically. This often causes saddles to creep forwards or slip backwards, even when everything else appears correct. This type of issue is one of the more subtle findings that a professional saddle fitting assessment is designed to identify.
Many horses have a forward girth groove, particularly rounder ponies, but also many Quarter Horses, Arabs, and Warmbloods. In these cases, girth straps positioned too far back can pull the saddle onto the shoulders.
Adjusting girth strap position is often straightforward and can usually be done by a qualified saddler to improve stability and placement.
Tree Width and Angle Alignment
The tree angle must match the angle of the horse’s shoulder. A tree that is too narrow will pinch, while one that is too wide can create instability and downward pressure onto the withers. For a detailed explanation of how tree points interact with the horse’s shoulder, see our guide on short and long tree points.
Tree width is a separate measurement and refers to the distance between the tree points at the front of the saddle. A horse may need a wide tree width but a narrower tree angle, or the opposite. Both must be correct for the saddle to fit properly.
Correct tree dimensions allow the shoulder to rotate freely. Poor alignment can restrict movement, cause resistance in transitions or turns, and lead to discomfort.
Long-term pressure in this area can result in muscle loss and hollows behind the shoulder. These changes are not normal and will not resolve without correcting the saddle fit. If you notice hollowing behind the shoulder, this is one of the clearest signs that a saddle fitting check is overdue.
rider fit checks (twist, seat,stirrup bars)
Seat Twist and Seat Width
The twist is the narrowest part of the saddle seat, where the rider’s thighs sit. Its shape and width have a significant impact on rider comfort.
If the twist is too narrow, high, or firm, it can create pressure in sensitive areas, particularly for women. This often prevents the rider from sitting deeply and comfortably, leading to constant movement in the saddle. Rider comfort is also one of the areas addressed through our sports therapy for horse riders service, which looks at how your position and biomechanics interact with the saddle.
Pelvic shape varies greatly between riders. If the seat is too narrow, the seat bones may not be properly supported, pushing pressure into softer tissue instead. A saddle that fits the horse well may still be unsuitable for the rider if this area is incorrect.
Choosing a saddle with the right seat width and twist shape for your own build is essential for comfort, balance, and long-term riding enjoyment. Browse our saddle brands to explore options across different seat designs and disciplines.
Stirrup Bar Placement
Stirrup bar placement has a major influence on rider balance and lower leg stability. Stirrups naturally hang vertically due to gravity.
If the stirrup bars are positioned too far forward — common on many GP saddles — the rider is pushed into a chair seat. Attempting to correct this by forcing the leg back causes the stirrup leather to angle backwards, leading to instability. This is closely related to how rider position affects the horse, which is explored further in our resource on how saddle fitting works.
For correct shoulder–hip–heel alignment, the stirrup leather should hang vertically when the rider is in balance. When the stirrup bar is positioned correctly, the rider’s leg naturally becomes quieter and more secure.
Seat Size
The saddle seat must be the correct size for the rider, taking into account build, leg length, and overall proportions, as well as the design of the saddle itself.
Different saddle styles feel very different in the same stated size. Flatter seats often allow a slightly smaller size, while deeper seats usually require more room. As a general guide, the rider should be able to fit around three fingers between themselves and the cantle when seated correctly.
The rider should feel securely in the saddle, not perched on top of it. Because rider shape varies so much, seat size is highly individual, and the only reliable way to confirm correct fit is by sitting in the saddle. If you would like help finding the right seat size and saddle for your build, book a fitting with Ian Phillips across West Sussex, Hampshire, and Surrey.
What do you think of this picture showing a person sitting in the saddle?
If you think about the balance of the saddle and the flat spot in the seat, you can clearly see that the rider’s bottom is sitting back, into the elevating section of the seat, and in front of they’re not sitting forward into the pommel area.
This is potentially pushing them back and driving more weight back into the rear of the panels, tipping the saddle backwards.