What Are Stiles on a Shutter?

A shutter panel swings open and closed on a hinge, like a door, with moving slats that control light when the panels are closed. The components that hold everything in place are called stiles.

Stiles are the left and right vertical rails that hold the slats in place, connecting to the solid top and bottom rails to form your shutter panel.

What Do Stiles Look Like?

As shown in the illustration above, solid material surrounds the movable slats (also called louvers) on each shutter panel. While top and bottom rail sizes vary depending on window height and slat size, the left and right vertical stiles are always a fixed 2" wide per side, regardless of material, style, or size ordered.

Why Does Stile Width Matter?

The standard 2" width is the factory-recommended thickness for durability and structural integrity over time. This size cannot be modified, as doing so would result in a less stable product.

Knowing your stile width helps you make two key design decisions:

Checking recess depth — to determine which frame and slat size you can use.

Choosing the number of panels — to achieve your preferred look and functionality.

Checking Recess Depth

Each slat size requires a specific amount of recess depth to fully rotate open and closed without hitting the glass or any obstructions. All requirements are detailed in our step-by-step measuring guides.

How to measure recess depth:

Measure from the edge of the wall or trim surrounding your window back toward the glass or nearest obstruction (crank handle, alarm sensor, etc.) A few things to keep in mind:

• There is a 2" solid stile on each side of the panel, so a small lock or sensor located less than 2" from the sides of the window opening will not obstruct slat operation.

• For an outside mount, you will have the outside mount frame plus the 2" stile before any moving slats — factor this in when calculating where the slats will begin, to ensure your chosen slat size can fully operate without obstruction.

Still Have Questions?

Whether you need help with shutter terms, design choices, measuring, or installation, our shutter experts are available by phone or email and happy to help.