The only saddle pad endorsed by back surgeons, master saddlers and veterinarians.

Western Trim-to-Fit Shims (Pair)

Western Trim-to-Fit Shims (Pair)


Shims can be stacked & layered.

If you are not in the USA, please click on your region flag to place an order.

SKU: Western Shims-1-1

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This product is the trim-to-fit shim only, saddle pad not included.

What is ThinLine?

ThinLine is a thin, shock-absorbing nonslip breathable foam. It is endorsed by surgeons, master saddlers, riders, and veterinarians.

Where is the ThinLine?

It is sewn onto the panel of our Western saddle pads which have an open pocket, allowing you to place saddle fitting shims exactly where you need them.

Banner Therapeutic Saddle Pads

ThinLine material not only improves saddle fit, but also provides comfort and protection.

Saddle Shim Post


When you see ThinLine sewn onto any Western saddle pad, there is a pocket for you to add inserts, also called shims.

Western Trim-to-Fit Saddle Fit Shims, inserts are made of our amazing, shock-absorbing ThinLine foam.

Western Trim-to-Fit saddle fit shims are available in 2 thicknesses of amazing shock-absorbing protection.

  • ThinLine 3/16″(4.8mm)
  • ThinLine + 1/4″(6.4mm)

4 styles of Saddle Fitting Shims can be made from our Trim-to-Fit shims. All shims come in pairs.

  • Trim-to-Fit Shims –4 shims in 1! This full-length shim meets all of your shimming needs! Trim to create a pair of Front, Bridging, and Rear Saddle Fitting Shims or use as a single shim to Boost your overall ThinLine protection and comfort. The most cost-effective and versatile way to shim your pad! Simply use scissors or a box blade to trim.


Western Saddle Fit ShimsFinal Booster Shim Design3

Photos show the options you can create by trimming them down or choosing to leave them as a full shim.

0704TTFedited web

To order a saddle pad with shims, please click here.

western saddle fit shims

Our exclusive foam makes saddles fit better, and horses more comfortable.

Inserts stay put without shifting and you may stack up to three sets. We do not divide the pocket, allowing you or your saddle fitter to place the inserts precisely where your horse needs them.

If you find you no longer need inserts, just remove them and keep all the great benefits of your ThinLine Pad!

We have a list of saddle fitters on our dealer page if you would like to consult with a specialist.

Western Saddle Pad Shim Colors

ThinLine+ saddle shims are available in black only. ThinLine shims may arrive in black, brown or white. Since Western saddle shims for horses cannot be seen inside your pad, color is not an issue.

Please note: Bridging Saddle Shims for Swayback – If your saddle is bridging, you are missing contact in the middle of the horse’s back and there is too much contact at both the wither and the cantle. When using bridging shims, we recommend you start slowly. Use only one or two at a time. You will discover your horse will begin to lift their top line and develop more muscle with ThinLine. Once the muscle is developed it is often possible to remove one or all of the shims. Good news: you keep your ThinLine pad and horses continue to use their backs correctly.

western saddle fit shims inserts sweat marks

How your horse should look – no dry spots in the sweat patterns

Do I need to call a saddle fitter?

We have a list of saddle fitters on our dealer page if you would like to consult with a specialist.

Additional information

Weight 1 lbs
Dimensions 15 × 12 × 1 in
Shim Style

Trim to Fit ThinLine + 1/4, Trim to Fit ThinLine 3/16


3381- Woven Wool Western Rd Skt, 3381- Woven Wool Western Sq 31×30, 0703-Contour Ranch Pad 30×30, 0704-Contour Ranch Pad 32×30, 0731-Contour Rd Skt Ranch Pad, 0732- Tough Rider Endurance Wax Pad, 7304-Cotton Liner Med-28×28 Sq, 7304-Large Cotton Liner 32×30, 7304-Cotton Liner Small-Rd Skt, 7334-Large Pro-Tech, 7334-Medium Pro-Tech, 7334-Small Rd Skt Pro-Tech, 7336-Diamond Line Western Endurance, 7340-Felt Liner, 8022-Western BOT Contender Pad, 8801- Cotton Drop Rigging Endurance Pad, 8802-Fleece Drop Rigging Endurance Pad

How to Buy Outside the USA

ThinLine is readily available in most countries. This site ships to the USA, Mexico, and South America.

We hope you will use the following links to our authorized distributors in the following regions. Here you will find all the great products and support you need:

Europe and the UK:




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    Which shims do I need for the Western liner round skirt pad?
  1. Q Which shims do I need for the Western liner round skirt pad? answer now

    Hi. When in the western saddle fitting shim product select the thickness of the shim (1/4 inch or 3/16 inch) the next box will list the pads. Select 7304-S Western Cotton Liner Round Skirt. You are done. Happy riding!

  2. how do i know which pad i'm getting?
  3. Q how do i know which pad i'm getting?
    There are no answers for this question yet. Answer now

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