2.1.1542 Part 1 Section 126.96.36.199, thickness (Thickness)
a. The standard states that the values of the val attribute are defined by the XML Schema unsignedInt datatype.
Office restricts the value of this attribute to be at most 100.
b. The standard states that thickness is a percentage of the largest dimension of the plot volume.
In Office, thickness is a percentage of the smaller of the height and width of the 3D chart. The height of the 3D chart relative to the width is specified by hPercent.