Shutter Slat Widths Explained

Shutter slats — also known as louvres — are available in several standard sizes in the UK, each offering unique aesthetic and functional benefits. The slat size you choose can dramatically impact the look of your shutters, the amount of light that enters the room, and your level of privacy.

📏Popular Slat Sizes:

47mm Slats –

• Traditional and Compact
• A classic choice, ideal for smaller windows or traditional interiors.
• Often associated with French-style shutters.
• Provides a timeless look, but allows less light due to the higher number of slats per panel.
• Available only in select shutter materials.

63mm Slats –

• Versatile and Balanced
• A popular middle ground between traditional and modern.
• Suitable for most window sizes.
• Offers a cosy feel while allowing moderate light.
• Requires only a slight angle adjustment to achieve privacy — great for maintaining natural daylight.

76mm Slats –

• Contemporary and Practical
• The go-to choice for many modern homes.
• Lets in more light and gives a clearer view when open.
• Works well for medium to large windows, including bays.

89mm Slats –

• Modern and Minimalist
• A favourite in contemporary interiors.
• Fewer slats per panel for a cleaner, more open look.
• Maximises light flow and outside visibility.

114mm Slats –

• Bold and Statement-Making
• Best suited to large windows or open-plan spaces.
• Offers maximum light and a dramatic, architectural style.
• Creates a sleek, minimal finish — ideal for modern interiors.
• Available only in select shutter materials.

Choosing the Right Slat Size

When deciding on your slat width, keep these key considerations in mind:

Window Size:

Larger slats pair best with larger windows for a clean, proportional look. Smaller slats suit compact or traditional window styles.

Light and Privacy Control:

Bigger slats let in more light and offer a better view, but may compromise privacy. Smaller slats diffuse light and provide more coverage.

Interior Style:

Classic or period-style homes often suit smaller slats, while contemporary homes lean towards larger slats for a more minimalist finish.

Practicality:

Bigger louvres need more clearance to rotate, which can be an issue near window or door handles. They may be less suitable for windows with shallow recesses or tight bays.

Need Help Deciding?

Still unsure which slat size is best for your space? We’re here to help. Book a free consultation and let our experienced team guide you to the perfect shutters for your home.