PLEASE USE THE FOLLOWING TO HELP DETERMINE YOUR SPA COVER SIZE:   1. Determine the letter that matches the shape of your spa or hot tub. 2. Note how you must measure the tub. We recommend measuring the fiberglass portion of your spa, through the center N to S and E to W. 3. Insure that fold direction Is correct. Dotted line or measurement #2 represents the standard fold. The #2 measurement WILL be broken for the fold. 4. If you know the tub make and model we can look up the manufacturers recommended cover size.  Measurements in inches only please.  *Shipping/Order Policy

**EXAMPLE**: Tub Letter "G"     Measurement #1= 90"  Measurement #2= 96"

Easy way to Measure a Radius (rounded corner):   Simply place a carpenter's square (two rulers will work too!) against  the curved outside corner of your spa. The distance from point X (where curve starts) to Y (the crotch of your square) = Radius. NOTE: The length of the curve itself is not the radius.  Measure on the square. TIP: Don't have a square? Make one from a piece of stiff cardboard.