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Saddle Fitting Shims for English Trifecta Cotton Half Pad-7305


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ThinLine material protects horses and creates a perfect saddle fit.

Master Saddlers and ThinLine developed a shimming system designed to create custom saddle fit while also providing shock absorbing therapeutic benefits. ThinLine English cotton saddle pad shims are made from the same trademark foam found on ThinLine pads. In addition, shims are easily inserted or removed and stay in place during riding and washing.

Front, Bridging or rear English Shims



These shims are designed to fit only the 7305-All Cotton Trifecta pads.

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All ThinLine saddle pads come with a panel of this shock absorbing material sewn to many saddle pad styles, including Western Saddle Pads. Saddle fitting shims are made of the same material as the ThinLine panel. You would require shims only if you need to alter your saddle fit. Please use the shop now button to view shims for pads other than the cotton trifecta or if you would like to view our full line of saddles pads – all pads include this exclusive foam.

Saddle Fit Problems Solved: High Withers, Bridging, Asymmetry, Soreness.


Half Pad saddle fitting shims are available for all riding styles. (Full Cotton pads are shown for demonstration.)

Easy installation.

Open pocket allows for perfect placement.

Shims will not shift or move.








Once inserted, shims are invisible.
custom saddle fit shims inserts
Use one or layer for a seamless feel.








ThinLine Trifecta half pads have an open pocket. As a result, you place shims exactly where you need them. The pocket has room for up to three 1/4 inch shims in the same location. When stacking multiple shims, place one just behind the other to create a seamless transition.

Half Pad shim options. Shims are sold in pairs.

Booster Shims

Front Shims provide lift in the wither area and can be used to fill in behind shoulders.

Bridging Shims are used to support hollow or sway backs. ThinLine foam encourages horses to lift their back thus developing better muscle tone over their toplines.

Rear Shims are designed to lift the cantle of the saddle chiefly to create balance.

Saddle Fitter Kits featuring 1 set of front 1/4″ shims and 2 sets of 3/16″ rear shims.

The full Booster Shim fills the entire ThinLine panel. Booster shims allow you to create ThinLine+ (1/4″) thickness for ulitmate protection.

Saddle Fit and Asymmetry (Crookedness).

Saddle trees are symmetrical, frequently horses are not. Shimming is generally the best solution for asymmetrical horses. ThinLine shimmable pads provide therapeutic protection. When working with asymmetry, leave the full side un-shimmed. On the hollow side, turn one shim upside down and insert the pair (both shims)  into one pocket. As a rule, once horses begin working in ThinLine, they feel comfortable enough to stretch into the hollow places and will become straighter.  Keep an eye on your saddle fit and slowly remove one shim at a time.

Saddle Fit and the hollow or sway back.

Bridging shims are a simple way to create the missing contact. Swayback or not, you will find bridging shims to be the easy solution.

Saddle fitting shims for english half pad

Horses will often develop better topline in ThinLine.

Horses grow and change throughout their lifetime. For this reason, our English cotton saddle pad shims are easy to remove. Keep riding the great benefits of your ThinLine Pad with or without saddle fitting shims.

Incidentally, ThinLine Plus+ shims (1/4″) are available in black only. ThinLine (3/16″) shims may arrive in black, brown or white. Shims with texture on top are ThinLine 3/16″, if there is no texture on one side it is a ThinLine+ (1/4″- the thickest) saddle fitting shim.

Finally, thank you for trusting us with your saddle fit needs.  Saddle Fitting Shims for English Trifecta Cotton Half Pad-7305



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Questions and answers of the customers

  1. A Thank you for getting in touch! All of our shimmable pads will fit up to three sets of shims inside the open pocket. Click here to go to the Saddle Fitting Shim page for the 7305 Trifecta Cotton Half Pad. You can type "shims" in the search box to find the Saddle Fitting Shim product page. In the drop-down menus, select the size of your pad and the type of shim needed. If you have any other questions or would like help ordering your shims, please call us at 888-401-9101.
  2. A Thank you for your question! The pockets created by the ThinLine panels are designed to hold up to three sets of shims, so they will accommodate two booster shims as well.