There are an infinite number of squircles between the circle and the square. One of them will be the closest match to the profile of the New Beetle at the A-pillar. These are not it*, at 50/50. Something about 65-75% toward a square would be closer. The rear quarter windows should be unobscured.
The lower body is held to the original overall length; the wheels are covered and the 'shoulder' is moved forward for aero reasons. The upper body is sized to the length of the rear hatch and could be extended.
*Truncated, widened and stretched to fit.