Enter your measurements here and we'll check whether this cover fits.
mm
mm
Rmm
Find the point where a straight edge of your spa starts to curve into the corner.
Follow the straight edge to the corner point, where the two straight edges would meet if they kept going.
Measure the distance from the corner point back to where the curve begins. That distance is your corner radius.
IMPORTANT: A larger radius is a rounder corner and less likely to fit. A smaller radius fits more easily but may not hug the corners, which can let heat escape. Measure accurately rather than rounding up or down. A square corner is R0.