64mm, 76mm or 89mm? How to Choose the Right Louvre Size for Your Shutters
When you choose plantation shutters, one of the biggest decisions is the size of the louvres: the horizontal slats that tilt open and closed. The louvre size changes how your shutters look, how much light and view you get, and how they suit the window. Here’s a simple guide to our three louvre sizes: 64mm, 76mm and 89mm.
What does louvre size mean?
Louvre size is the width of each slat, measured from front edge to back edge. On the same window, smaller louvres mean more slats in each panel, and larger louvres mean fewer, wider slats with bigger gaps between them when they are open. In our illustration, the same panel holds 19 louvres at 64mm, 16 at 76mm and 13 at 89mm.
Louvre sizes compared
| Louvre size | Look | Light and view | Often suits |
|---|---|---|---|
| 64mm | Classic and traditional, with more, finer slats | A more filtered view when the louvres are open | Smaller windows, period properties and cottage-style rooms |
| 76mm | Balanced, neither too busy nor too bold | A good mix of light, view and privacy | Most windows and rooms |
| 89mm | Bold and contemporary, with fewer, wider slats | A clearer view and more light when open | Large windows, bay windows and patio doors |
64mm louvres: a classic, traditional look
Smaller louvres give a finer, more detailed finish. With more slats in each panel, they keep a window looking in proportion, which is why they are a popular choice for smaller windows and for Victorian and Edwardian homes where you want the shutters to feel in keeping with the period.
76mm louvres: the versatile middle ground
76mm louvres sit between the two and work well in almost any room. If you like the look of shutters but are not sure which way to go, this size is a safe, balanced choice for living rooms, bedrooms and kitchens alike.
89mm louvres: a clearer view and more light
Wider louvres mean fewer slats and wider gaps when they are tilted open, so you see more of the view and let in more light. They give a clean, modern look and suit large windows, bay windows and patio doors, where smaller louvres could look busy.
How to choose the right louvre size
- Window size: as a rule of thumb, smaller windows suit smaller louvres and larger windows suit larger louvres.
- Style of your home: 64mm often suits period properties, while 89mm gives a more contemporary feel.
- Light and view: if keeping your view matters most, larger louvres give a clearer outlook when open.
- Window depth and handles: wider louvres need more space to tilt open, so window handles and the depth of the recess can affect which sizes will fit. We check this when we measure.
- Consistency: many customers keep the same louvre size throughout the front of the house so it looks uniform from the street.
See the louvre sizes in your own home
Louvre size is much easier to choose when you can see it at your own window. At a free home design visit, we bring samples, measure your windows and talk through light, privacy and colour, before giving you a written quote.
All our wooden shutters are made to measure in Britain, with a typical lead time of 3–4 weeks and a 10-year guarantee. Explore our full height, tier-on-tier and café style shutters, or shutters for bay windows.