Not even sure if this is (easily) possible but does anyone have the anwser or suggestion to the following question.

I currently have a moulded seal that is designed to fit onto a Dia 95mm part. I wish to redesign the part so that the seal now fits onto an elliptical part.

Is there any way that I can get solidworks to set the perimeter to the ellipse to equal that of the circle whilst I experiment with different major axis dimensions?