[header] How to dress narrow windows [title] Measure the window horizontally to determine the width. [step] Hold your tape measure at the left side of your window, then stretch it across until it reaches the right side. Ensure the left side measurement starts at 0. 
[substeps] Measure width of the inside trim of your window if you are planning to get blinds [title] Measure the window vertically to determine the length. [step] Hold the tape measure at the very top of your window, and pull it downwards until you reach the bottom.