Of all the checks that a horse owner can carry out at home between professional saddle fitting appointments, assessing the clearance at the withers is perhaps the most important and the most immediately informative. The withers — the bony prominence at the base of the horse's neck where it meets the back — is one of the most sensitive and most vulnerable areas of the horse's body in relation to saddle fit, and a saddle that is pressing on or sitting too close to the withers is a saddle that is causing discomfort and potentially lasting damage, regardless of how well it may be fitting in other respects.

The good news is that assessing wither clearance is one of the more straightforward home checks a rider can carry out, and with a little knowledge and a careful eye it can be done quickly and reliably as part of a regular saddle monitoring routine. This guide walks you through exactly how to carry out this assessment, what to look for, and what to do if your findings give you cause for concern.

For professional saddle fitting and wither clearance assessment, please visit us at www.thefittedhorse.com/saddle-fitting. You can also find further reading on saddle fit and all aspects of equine equipment in our Knowledge Centre at www.thefittedhorse.com/knowledge-centre.

Why Wither Clearance Matters

Before carrying out the assessment, it is helpful to understand why wither clearance is so significant and what the consequences of insufficient clearance are for the horse.

The withers is a complex structure of bone, cartilage, ligament, and muscle — the spinous processes of the thoracic vertebrae extend upward to form the characteristic ridge that we recognise as the wither, and this area is covered by relatively little protective tissue compared to the broader areas of the back on either side. This means that pressure from the saddle in the wither area is transmitted relatively directly onto sensitive structures, with limited ability to absorb or distribute that pressure.

The consequences of a saddle that presses on or sits too close to the withers include:

• Direct pressure on the spinous processes, causing pain, bruising, and in more serious or longstanding cases, lasting bony changes and damage to the cartilage and soft tissue of the wither area
• Restriction of the horse's shoulder movement — the shoulder blade sweeps backward and upward during movement, and a saddle that is sitting too close to the withers at the front will interfere with this movement, restricting the horse's stride and causing discomfort
• Muscle tension and soreness through the shoulder, neck, and back — a horse that is carrying a saddle that is pressing on the withers will instinctively brace and tighten in response to the discomfort, creating a chain reaction of tension that affects their entire way of going
• Behavioural changes — including reluctance to go forward, resistance to being tacked up, sensitivity when the saddle area is touched, and deterioration in the quality of the ridden work
• In more severe cases, the development of a condition known as wither pressure sores — open wounds or areas of hair loss and tissue damage at the withers that develop as a direct result of sustained pressure from a poorly fitting saddle

Understanding these consequences underlines why regular monitoring of wither clearance is not simply a recommended good practice but a genuine welfare imperative.

What Affects Wither Clearance?

Wither clearance is affected by a number of factors, and understanding these factors helps to explain why it can change over time and why regular monitoring is so important.

• The width of the saddle tree — the internal framework of the saddle — is the primary determinant of wither clearance. A tree that is too narrow will sit too high and close on the withers, creating direct pressure. A tree that is too wide will sit too low, allowing the pommel arch to drop down toward the withers and potentially making contact under the rider's weight
• The shape and angle of the tree head — the front portion of the tree that determines how the saddle sits at the wither and shoulder — must match the individual horse's wither profile and shoulder angle. A mismatch between the tree head angle and the horse's shoulder angle can create uneven pressure on one or both sides of the wither even when the overall width appears approximately correct
• Changes in the horse's condition — weight gain or loss, muscle development or loss, seasonal changes in condition — can all affect the height of the withers relative to the surrounding back musculature and therefore change the clearance available
• The fit of the saddle panels — if the panels are overfilled, underfilled, or unevenly filled, this can tilt the saddle in ways that affect the clearance at the withers even if the tree itself is the correct width
• The use of numnahs and saddle pads — a thick or poorly fitted numnah can reduce the available clearance at the withers by adding bulk beneath the pommel arch, and this is something that must always be considered when assessing wither clearance

What You Will Need

• Your saddle — clean and in its normal condition
• Your usual numnah or saddle pad if you use one — as discussed below, you will carry out some checks with and some without the numnah
• A level, well-lit area in which to work
• A helper if possible — some elements of the assessment are easier to carry out with two people
• Your fingers — the primary tool for most of the checks described in this guide

Before You Begin

• Ensure your horse is standing squarely on a level surface — an uneven surface or a horse standing with their weight unevenly distributed will give you an inaccurate picture of how the saddle is sitting
• Allow your horse to stand quietly for a few minutes before carrying out the assessment — a horse that has just come in from the field or that is restless and moving around will not give you reliable results
• Carry out the assessment on both sides — wither clearance can differ between the near side and the off side, particularly in horses with natural asymmetry, and checking both sides is important for a complete picture
• Carry out the checks both without a numnah and with your usual numnah in place — this allows you to see the difference that the numnah makes to the available clearance and to identify whether a thick numnah is reducing clearance to an unacceptable level

Step One — Visual Assessment Without a Numnah

Begin by placing the saddle on your horse's back without a numnah, in its correct position, and without girthing it up. Allowing the saddle to sit in its natural resting position without the influence of the girth gives you a baseline picture of how the tree is fitting at the withers.

• Stand directly in front of the horse and look at the saddle from the front — you should be able to see a clear and open channel running the full length of the saddle from front to back, with the pommel arch sitting above and clear of the withers
• Look at the gap between the lowest point of the pommel arch and the highest point of the withers — this gap should be clearly visible and should appear generous rather than tight
• Look at the position of the saddle relative to the withers from both sides — the saddle should appear to be sitting clear of the withers on both sides, with no part of the pommel arch or the tree head making contact with the wither on either side
• A saddle that appears to be sitting very close to the withers at this stage — without a girth and without a rider's weight — is likely to be making contact under the pressure of girthing and riding, and should be assessed professionally before being used

Step Two — The Finger Check Without a Numnah, Ungirthed

With the saddle in its correct resting position on the horse's back and without a girth, carry out the finger check to assess the available clearance.

• Stand at the side of the horse and place your hand flat against the front of the saddle at the pommel
• Slide your fingers vertically into the space between the pommel arch and the horse's withers, with your fingers pointing downward
• Count how many fingers you can comfortably fit in the space between the pommel arch and the withers
• As a general guideline, you should be able to fit a minimum of two to three fingers upright in this space when the saddle is ungirthed and without a rider's weight
• More than three fingers of clearance is not necessarily a problem — some horses and some saddle designs will have more clearance than this as a natural result of their conformation and the saddle's design. The concern is when clearance is less than two fingers, as this indicates that the tree may be too narrow or the saddle sitting too close to the withers
• Repeat this check on both sides — if you find significantly different clearance on the near side compared to the off side, this asymmetry is worth noting and reporting to your fitter

Step Three — The Finger Check Without a Numnah, Girthed

Girth the saddle up to its normal working tension — the tension you would use for riding — and repeat the finger check.

• Slide your fingers vertically into the space between the pommel arch and the withers in the same way as before
• Note how the clearance has changed compared to the ungirthed check — it is normal for the clearance to reduce slightly when the saddle is girthed up, as the girth draws the saddle downward against the horse's back
• There should still be a minimum of two fingers of clearance when the saddle is girthed up — if the clearance has reduced to less than two fingers, or if any part of the pommel arch is making contact with the withers, this is a concern that requires professional assessment before the saddle is used
• Check both sides and note any asymmetry between the near side and off side clearance

Step Four — Assessing Clearance With a Rider's Weight

The most critical check of all is the assessment of wither clearance with a rider's weight in the saddle, because this is the condition in which the saddle will be spending the majority of its working life, and it is the condition in which insufficient clearance is most likely to cause harm.

• With the saddle girthed up at normal working tension, ask your helper to mount and sit in their normal riding position — the rider should sit in the deepest part of the seat, in a balanced and relaxed position
• Stand at the front of the horse and observe the clearance between the pommel arch and the withers with the rider's weight in the saddle
• There must be a clear and visible gap between the pommel arch and the withers — any contact between the saddle and the withers with the rider mounted is unacceptable and requires immediate professional attention
• Ask your helper to carry out a few transitions — walk to halt, halt to walk — whilst you observe the clearance from the front, as transitions create moments of increased downward pressure in the saddle and are one of the most revealing tests of whether clearance is genuinely adequate
• As a general guideline, there should be a minimum of two fingers of clearance between the pommel arch and the withers with the rider in a normal seated position. Some fitting authorities use three fingers as their minimum guideline with a rider mounted, reflecting the additional pressure that the rider's weight places through the front of the saddle
• Repeat the observation from both sides, checking for any asymmetry in the way the saddle is sitting relative to the withers with the rider mounted

Step Five — Assessing Clearance With Your Numnah

If you use a numnah or saddle pad under your saddle, it is essential to assess the wither clearance with the numnah in place, as a thick or poorly fitted numnah can significantly reduce the available clearance.

• Place your usual numnah on the horse's back and position the saddle on top of it, ensuring that the numnah is correctly positioned and that the front of the numnah has been pulled up into the channel of the saddle to prevent it from pressing down on the spine
• Carry out the same finger checks as described in steps two and three — with and without the girth
• Compare the clearance with the numnah to the clearance without it — if the numnah is significantly reducing the available clearance, this is important information that should inform your choice of numnah going forward
• A thick, rigid, or memory foam numnah can reduce wither clearance more significantly than a thinner, more flexible option, and for horses with borderline wither clearance this can tip an acceptable fit into an unacceptable one. If your numnah is noticeably reducing clearance, consider switching to a thinner, more flexible option and discuss the findings with your fitter at your next appointment

Step Six — Checking the Wither Channel Clearance

In addition to the clearance above the withers, it is important to check that the channel of the saddle — the gullet that runs the full length of the saddle between the panels — is providing adequate clearance over the horse's spine throughout its length, not just at the withers.

• With the saddle correctly positioned and girthed, look at the saddle from directly behind the horse — you should be able to see a clear channel of light running the full length of the saddle from front to back, indicating that the panels are not pressing on the spine at any point
• The channel should appear even and consistent in width throughout its length — a channel that narrows significantly at any point along its length, or that appears to close at the front or rear of the saddle, is worth noting and discussing with your fitter
• Run your hand carefully along the channel from the back of the saddle toward the front, feeling for any points at which the panels appear to be pressing toward the spine — there should be a consistent and clear space between the panels and the horse's spine throughout the full length of the saddle

Step Seven — Post-Ride Wither Assessment

After your ride, take a few moments to carry out a post-ride assessment of the wither area — this can provide important additional information about how the saddle has been fitting during the session.

• Remove the saddle and numnah and immediately run your hands gently but firmly over the wither area, feeling for any areas of heat, sensitivity, or muscle tension that were not present before you rode
• A horse that reacts to pressure over the wither area after riding — flinching, moving away, or showing sensitivity when the area is touched — may be experiencing pressure from the saddle in this area
• Look carefully at the wither area for any signs of ruffled hair, pressure marks, or areas of hair loss — ruffled hair running against the natural direction of growth can indicate that the saddle has been moving or pressing on the wither area during the ride
• Observe the sweat pattern on the horse's back after a light schooling session — a dry patch directly over the wither, surrounded by sweating areas on either side, can indicate that the saddle is pressing on the wither and preventing normal sweating in that area. Conversely, an area of excessive sweating at the wither compared to the surrounding areas can also indicate localised pressure
• Note any changes you observe and report them to your fitter at your next appointment — patterns of post-ride sensitivity or marking that develop consistently over time are important diagnostic information

Signs That Your Wither Clearance May Be Insufficient

The following signs, taken together or in isolation, suggest that your saddle's wither clearance may need professional assessment:

• Less than two fingers of clearance between the pommel arch and the withers when the saddle is ungirthed
• Less than two to three fingers of clearance when the saddle is girthed up
• Any contact between the pommel arch and the withers with a rider mounted
• The channel of the saddle appearing to close or narrow significantly at the front
• Post-ride sensitivity or heat over the wither area
• Ruffled hair, pressure marks, or hair loss at the withers
• Dry patches directly over the wither in the sweat pattern after riding
• Your horse showing reluctance to go forward, resistance to being tacked up, or sensitivity when the saddle area is touched
• Deterioration in the quality of movement — particularly restriction through the shoulder or tightness through the back and neck
• The saddle appearing to shift or move during riding — a saddle that rocks from side to side or tips forward may be fitting incorrectly at the wither as well as in other areas

What to Do If You Have Concerns

If any of the checks described in this guide give you cause for concern, the most important thing you can do is stop riding in the saddle and seek professional assessment promptly. Continuing to ride a horse in a saddle with insufficient wither clearance will cause progressive discomfort and potentially lasting damage, and the longer the problem persists the more complex and time-consuming the rehabilitation process is likely to be.

At The Fitted Horse, our professional saddle fitting service includes a comprehensive assessment of wither clearance as part of a complete saddle fit evaluation. We look at every aspect of how the saddle is sitting and functioning on your individual horse, and we make recommendations that are grounded in a thorough understanding of both equine anatomy and saddle design. If you have any concerns about your saddle's fit — including wither clearance — please do not hesitate to get in touch.

For horses fitted with a WOW saddle, insufficient wither clearance may indicate that the head plate needs to be changed or that the Flair panels need adjustment — both of which can be carried out by a qualified WOW fitter without the need to replace the saddle. You can read more about the WOW saddle system and how it accommodates changes in the horse's shape in our Knowledge Centre at www.thefittedhorse.com/knowledge-centre.

A Quick Reference Checklist — Wither Clearance Assessment

Without numnah, ungirthed:

• Minimum two to three fingers of clearance between pommel arch and withers
• Clear and open channel visible from the front and from behind
• Saddle sitting clear of the withers on both sides
• No asymmetry in clearance between near side and off side

Without numnah, girthed:

• Minimum two fingers of clearance maintained after girthing
• No contact between pommel arch and withers
• Channel remaining clear and open throughout its length

With rider mounted:

• Clear and visible gap between pommel arch and withers
• Minimum two to three fingers of clearance maintained under rider's weight
• No contact between saddle and withers during transitions

With numnah:

• Numnah not significantly reducing available clearance
• Front of numnah pulled up into channel — not pressing on spine
• Adequate clearance maintained with numnah and girth in place

After riding:

• No heat, sensitivity, or muscle tension over wither area
• No ruffled hair, pressure marks, or hair loss at withers
• No dry patches or abnormal sweat patterns over wither area
• Horse relaxed and comfortable when wither area is handled

To book a professional saddle fitting consultation or to discuss any concerns about your saddle's fit, please visit us at www.thefittedhorse.com/saddle-fitting, or browse our full library of equipment guides and articles in the Knowledge Centre at www.thefittedhorse.com/knowledge-centre.