The size of the box will depend on the product you wish to conceal and the size of the window that you have. We recommend as large a box as practical for the best results. With a smaller box you may be limited by choice of materials you can use and also the hem bar may only just go inside the box. A larger box makes it easier for installation too.
See size chart for more examples.
Roller Blinds
For a window <2800mm wide and <3000 drop, we recommend W100x100 and W110x130 for some flexibility. The W110x130 can hold blinds for a window <4000mm wide and <3800mm drop.
Honeycomb Blind
For a standard window up to 2200mm long a W110x130 will be sufficient, with W110x170 the drop can be 3800mm. If you have a gable window with the blind stacking on the slope we recommend W110x170 minimum or W100x200mm ideally. In all cases it is best to check with Blindspace what we would recommend to be sure.
Rooflight Blind
For a rooflight it depends more on the type of system you are installing. The smallest systems, such as SHY ZIP, R110x130 can be used. It can hold blinds up to <1900mm wide and <2900mm long. In contrast, a TESS 660 from Guthrie Douglas that can do <2800 wide and <2700 length, can be installed without hembar box, concealing guide tracks and wires in side boxes. It requires the bigger R135x200 for headbox.