The size calculation method reference installed in the windows need depth(D)at least 7cm.
Custom width Width :2m~3.2m Height :1m~3m (Different styles,the data is slightly different]
Blinds inside (grey line part)
1.Blinds width = widow width (W) -1mm
2.Blinds height = widow height (H)
Blinds outside (brown line part)
1.Blinds width e widow width (w)+ 20mm
2.Blinds height = widow height (H)+20mm Price calculation
Total price = width(W) x height(H)* unit price x quantity + freight.
The price is a custom price per square meter,single less than 1m²? will be 1m²?
calculation more than 1m² will be actual square meter calculation.
(Calculation methods are routine calculations , only reference)