Measurements
Width and Height: Accurate dimensions of the window opening in inches or millimeters.
Depth: Measurement of the window jamb depth or wall thickness.
Clearance: Space for installation and proper fitting.

Frame Material: UPVC, Aluminium, Wood, or Composite.
Finish/Colour: Powder-coated, Anodised, or Natural finish with specified colour options.
Hardware: Locks, handles, hinges, and finish (e.g., matte, polished).

Direction the window faces (affects insulation, light, and heat gain).

Grills or Muntins: Decorative or functional divisions within the glass.
Blinds/Shades: Integrated or standalone window coverings.
Screens: Insect screens or privacy screens.

Standard vs. Custom Sizes: Indicate if all windows are of standard sizes or if some require custom dimensions.

Desired timeline for manufacturing and installation.

Specify if installation will be done by the supplier or independently.