Describes the dimensions of the shape.
Used only for the primitive shapes: Sphere, Capsule, Box.
• Sphere: size is the dimensions of a box enclosing the sphere (i.e., x, y, and z are all equal to the diameter).
• Box: size is the dimensions of the box.
• Capsule: size is the dimensions of a box enclosing the capsule (i.e., x and z are equal to the diameter of the capsule and y is the height).