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Add Saddle Fitting Shims to Full English Show Pad Dressage or Jumping


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SKU: ShimEnglishFull. Category: .

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 saddle fitting 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.

Full Cotton pads are shown but these shims fit Back on Track (Contender II) and our Full Sheepskin Dressage pad as well.

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

Adjust saddle fit and add more protection for your horse all in one easy step.

Image: Booster Shim Inserted into Pad

Front, Bridging or rear English Shims







custom saddle fit shims inserts
Use one or layer for seamless feel.




ThinLine 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.

Saddle fitting shim options.  By the way, shims are sold in pairs.

Booster Shims

Front Shims provide lift in the wither area and can be used to fill in behind shoulders. 1/4 inch thick.

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. 1/4 inch thick.

Rear Shims are designed to lift the cantle of the saddle chiefly to create balance. 1/4 inch thick.

Saddle Fitter Kits featuring 1 pair of front 1/4″ shims and 2 pairs of 3/16″ rear shims are also available.

The full Booster Shim fills the entire ThinLine panel. Booster shims allow you to create ThinLine Plus (1/4 inch) thickness for intense 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.

Western riders purchase bridging shims more frequently than English riders. Western saddles have a longer, straighter tree.  Bridging shims are a simple way to create the missing contact. Swayback or not, you may find bridging shims to be the easy solution.

Horses will often develop better topline in ThinLine.

Horses grow and change throughout their lifetime.   For this reason, we made our shims easy to remove. Keep riding the great benefits of your ThinLine Pad.

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

Finally, thank you for trusting us with your saddle fit needs.

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Questions and answers of the customers

  1. A Thank you for your question. All of our shimmable pads accommodate our bridging shims, so you'll be good to go no matter which pad you choose. Some of our pads use the same shims, but others are pad specific, so be certain to order the correct shims to go along with your pad! Please feel free to call the office if you'd like further help! 888-401-9101