If ordering a TOP COVER make sure to measure in both directions crossing in the center (making a cross)
Width x Length (in that order).
FULL COVERS measure the top in both directions (making a cross in the center) then the height. If there is pointed corners or you have a rectangle unit please place note on custom description field when placing the order.
Width x Length x Height (in that order).
WINDOW/THRU WALL COVERS measure the front of the unit height and width (making a cross in the center) and the depth to the outside/inside wall.
Width x Length x Depth (in that order).