Decide which way you'd like to install your curtain, inside mount or outside mount. Measure by the following instructions: 

Inside Mount

■ Install within the window frame. Often used in Bay Windows, or windows with windowsill.
■ Smooth and simple outlook. Reduce the area of covering window. 

Inside Mount Measurement

STEP 1：Measure the in frame width
Please measure positions of left, middle, and right. Write down the minimum figures of these three, and that is the blind width. 

STEP 2：Measure the in frame height 
Please measure positions of top, middle, and bottom. Record the maximum figures of these three, and that is the blind height.

STEP 3:  Measure the depth of window frame & the thickness of handle bar exceeds window frame. 
Depth of window frame — thickness of operating bar exceeds window frame  ≧ 7cm, the blinds can fit in the frame. 

■ Minimum size unit: 0.5cm
■ The shape of window may not be vertical and level. It is suggested to measure three positions of height and width to avoid
    unseccessful installation. 
■ Reducing 0.5~1cm is suggested for customized width. This is to leave some space for possible alteration in installation work.
■ The covering area of drape indents from left and right side. 2cm for ballchain control/ 1 cm for end control. Outside mount
    installation is suggested for complete coverage. 

Outside Mount

■ Install on the surface, wall, or ceiling beyond the range of frame.
■ Can cover the window completely, hide window frame, increase covering area and reduce light leak in 
    from surroundings. 
■ Can hide window shape and adjust visual effect of th space.

Outside Mount Measurement

STEP 1 Decide the length of blind:
Measure the in-frame width + extra width expected to cover = width needed

STEP 2 Decide the width of blind:
Measure the in-frame height + extra height expected to cover = height needed

■ Minimum size unit: 0.5cm
■ It is suggested to add more than 7~10cm all around the window frame. The actual extra covering area depends on the conditions of 
   the space or visual effects requested. 
■ If installed in the curtain box, reduce 0.5~1 cm on customized width is suggested to keep some space for possible alteration in 
   installation work. 

Reminders

■ The surroundings of window has to be completely flat and no obstables around when deciding window sizes. 
■ Sizes shown on the products in the shipment are the sizes including systems and components.

Illustrations of sizes of window/ curtain box

Video instruction

How to get complete sizes on installation area of inside mount/ outside mount?
How to know inside mount/ outside mount is best for your blinds/ curtains? 

>> Complete instruction