From Headus Docs

CySize Measurement Codes

Magenta Curves

 C = Point to point caliper measurement.
 S = Over surface length
 T = Convex hull tape measure length

White Sections

 A = Cross-sectional area
 S = Over surface girth
 T = Convex hull tape measure girth

Red Volumes

 V = Volume
 A = Surface area; doesn't include fill