An apparatus and method are provided for accurately recording measurements of a window and producing accurate window treatments. A reference strip is provided having measurement indicia thereon, such as a checkerboard pattern of squares of predetermined sizes. The reference strip may be placed proximate a window and photographed. The size of the window may be accurately determined from the resulting photograph using the associated reference strip. The window may also be measured and the measurements stored as biographic data and associated with the photograph to form an accurate and verifiable window biography. The biography may be provided to another party, such as a treatment manufacturer, who verifies the measurements of the biographic data using photograph and produces a suitable window treatment according to the measurements.