Lenght
*Determine length of top, 4?, 6?, OR 8?.

Width
*Determine the width of the top: Measure from mounting point (where top attaches on one side of boat to same location on opposite side of boat (not the same as the beam of the boat or boat width)

Height
* From mounting location, measure straight up with a tape measure for the correct top height. Choose from 42", or 54"