Many spa covers have rounded corners. In order for us to make you a cover, we must know how rounded they are. This is determined by figuring out their radius dimension.

The diameter of a circle is the measurement across the center.The radius of a circle is half of its diameter. Very simple.

Method # 1 for determining radius:
To determine the radius of your cover's corners, take a sheet a paper and trace around one of the curved corners of the cover. You will get a curved line similar to those shown at the left. Remove the paper and complete the circle. You can do this freehand, and it doesn't have to look too pretty! Just try to get it pretty close. Then measure across the middle of the circle you drew, and divide by 2. That is the radius of you cover's corners.

Method # 2 for determining radius:
Another way to measure the radius is by placing a carpenter's square on the outside corner of you spa. The distance between the corner of the carpenter's square and the place where it touches the spa (A) equals the radius of the curve (B).

Method # 3 for determining radius:
If you still cannot figure it out, or are unsure, please fax us a tracing (drawing) of your radius corner (206-870-8480). That way there can be no confusion.

Remember, if you are a little too big, the cover will still fit (and work) fine. However if you are even the slightest bit too small, the cover will not sit properly on the spa. If you have to guess one way or the other, go bigger.