Measuring a Radius (round corner)
Measuring a radius is not that difficult once you know how (See figure below). The key is to NOT make it too big, this is just the opposite of measuring your spa cover. If you measure the radius too big, it WILL NOT cover the radius corner (See figure below). However, if you measure it too small, it will be just fine. It may hang over a little but there will not be a noticeable difference. When in doubt,take the smaller measurement.