Width Eighths & Height Eighths

  1. When measuring your window, if the dimensions are not whole inches, the extra fraction should be expressed in eighths of an inch. Please refer to the image below for reference.

  2. As shown in the image:
    The measurement shown is 21 1/8“, then select “1/8” for Width eights/Height eights. 
    Similarly, if the measurement is in 1/16“ or 1/32” increments, round to the nearest 1/8”.