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English Saddle Fitting Shims (Pair)


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These English saddle pad inserts are made in three thicknesses of amazing shock absorbing protection:

  • ThinLine Plus+ 1/4″
  • Ultra ThinLine (thinner) 3/16″
  • ThinLine Plus+ Booster shim


Saddle shims for use in 4 different ways:

  • Front Shims
  • Bridging Shims
  • Rear Shims
  • Booster Shims – New full length shim. Turns your Ultra ThinLine Panels (3/16″) into ThinLine Plus thickness (1/4)” for added overall ThinLine protection.


Saddle Fitter Kits are now available!

  • Specially designed package gives you multiple shimming options in a value priced kit.
  • Kit includes 1 set of front shims in ThinLine Plus (1/4″) thickness and 2 sets of rear shims in ThinLine (3/16″) thickness.

Image: Booster Shim Inserted into Pad

Front, Bridging or rear English Shims

To order:

  • In the drop down menu, select the pad that you will be shimming.
  • Select the size of your pad. Half Pads, select small, medium or large. All other pads are one size.
  • Finally, choose the shim style and thickness.

Inserts have been carefully designed by Master Saddlers. They are custom cut specifically for each pad with a tapered edge to ensure you will never have a pressure point. 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 it.

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.

Colors: ThinLinePlus+ shims are available in black only. Ultra ThinLine shims may arrive in black, brown or white. Saddle shims cannot be seen inside your pad, so color is not an issue.

Please note: Bridging 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 saddle shims. Good news: you keep your ThinLine pad and horses continue to use their backs correctly.

Selecting Shims

All shimmable pads begin with Ultra ThinLine (3/16″, the thinnest we make) over a base pad. Each saddle pad has a pocket beneath the Ultra ThineLine to place optional shims for fine tuning saddle fit.

The only pads without the ability to shim, are the single sheets of ThinLine foam called Basic Pads.

We offer three different shim thickness choices – Ultra ThinLine, Thinline+Plus, and ThinLine+Plus Booster.

  •  – The ThinLine+Plus Booster is a single, full length shim that boosts your pad’s overall thickness from Ultra ThinLine(3/16″) to ThinLine+Plus (1/4″)
  • – Saddle Fitting Shims are available in the two thickness of ThinLine foam-Ultra ThinLine and ThinLine+Plus, to adjust (lift) the saddle in one of three areas; front, bridging, cantle (rear lift).
  • – Each pad has a custom designed shim for a perfect fit, so be sure to select the correct pad when ordering your shims.


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Questions and answers of the customers

  1. A Thank you for your question! The shims can be layered as needed to add the correct thickness to make the proper saddle fit adjustments. If you don't need additional thickness where the bridging shim meets the rear shim, they can be trimmed so that they meet evenly in a single layer. If you do need additional thickness in the area where they overlap, either shim can be on the top or bottom. If you have any further shimming questions, please feel free to call us at 888-401-9101.
  2. A Thank you for your question! Please refer to the sizing tab at the bottom of the product pages.
  3. A Hi and thanks for your question! If you saddle is bridging due to the developing sway, we recommend using the bridging shims. If your horse is losing muscle all along the topline, we recommend using the booster shim to fill in the space and add an additional layer of ThinLine protection. When in doubt, we always recommend working with a qualified saddle fitter! Please contact us if you'd like help locating one in your area.
  4. A Hi and thank you for your question! If you have a less than well fitting saddle, the saddle fitting shims can help adjust your fit. If your horse has hollows behind the wither, or a diminished topline, for example, adding shims can help fill in those spaces, ensuring even contact and weight distribution. If you're looking for extra back protection and comfort, the full length Booster shims provides that without altering your saddle fit. Please call us if you'd like more specific shimming help! 888-401-9101
  5. A Thanks for your question! Up to three sets of shims may be stacked to give you the lift that you need.