Modern wooden venetians come in three slat sizes:
- 25mm slat
- 35mm slat
- 50mm slat
The most popular wood slat size is 35mm at the moment. If you are buying for multiple windows then stick to the same slat size throughout the room and preferably house.
It would be normal to use 50mm on a large window (say a patio door) and 50mm also offers a more colonial feel.
25mm slats suit a smaller window, whilst 35mm seems to strike the best balance on most windows.
