More measuring tips: 1  Measure both your spa and your old cover, if possible. 2  Make sure the measurements are big enough. It is okay for the cover to be big. 3  Measure all sides of the spa.  Measure the overall length and width of the 1  spa. Be careful when representing the dimensions in our order forms.  Specify hinge direction.
benchmark - a standard by which something can be measured or judged; his painting sets the benchmark of quality. 2. benchmark - a surveyor's mark on a permanent object of predetermined position and elevation used as a reference point.
watermark. 1  a mark indicating the height to which water rises or has risen, as in a river or inlet. 2  water line (def 5). 3  a figure or design impressed in some paper during manufacture, visible when the paper is held to the light. 4  to mark (paper) with a watermark. 5  to impress (a design, pattern, etc.), as a watermark.