Determine corner radius and size correctly
How to find the right dimensions for your whirlpool cover.
When measuring the length and width, make sure you give us the measurements in centimetres and always round up to the nearest centimetre. When measuring, a little too much is better than a little too little. One centimeter too much in length won't make much difference, the cover will still fit, but one centimeter too little and the hot tub cover won't fit at all.
Classic whirlpool bath
Measure at the widest point of the acrylic rim as indicated by the arrows
Whirlpool tub with railing ring
Measure at the widest point on the railing, as indicated by the arrows
Measure the corner radius correctly
The most important thing is that you do NOT choose a radius that is too large. If you measure the radius too large, it will NOT cover the radius corner. If you measure the radius too small, this is not a problem. The lid may protrude a little, but this is hardly noticeable. If in doubt, always measure a little smaller than a radius that is too large.
Here's how
The radius is the measurement between the point of the extended corner and the start of the curve.
If you don't have an angle at hand, take a wooden slat, cardboard etc. and measure the distance with a tape measure or ruler
