Measuring curtain width
If you have a pole, measure the pole width excluding the end finials. If you have a track measure the total width.
Measuring curtain finished length
The finished length is the measurement from the very top of the curtain to the bottom hem.
Firstly, decide on where you would like your curtains to fall, this is your bottom hem position. The diagrams show suggested lengths for both sill, and floor length curtains.
Always measure the length to the left, right and centre of your pole/track. Where the measurements vary, choose the length that suits best.