This product is truly an eyeopener even if its accuracy, according to some, is not 100%. I checked those dimensions capable of being precisely modeled using cylinder/plane primitives and the product is spot on. Luckily for me almost all of my oc characters' key dimensions were almost exactly what I had wanted. However, Stacy (one of my oc female models) is going to need a "bit" of breast reduction for sure as a cup size of I is just way out of whack. She should be a borderline DD. Glad I picked up this product as it looks like the cup size dimension is easily unintentionally exaggerated. If you have the dough and are interested in more accurately sizing your characters pick it up. One thing I still need to test is whether the product can be used on male gens. Have a great day.
Update: Product doesn't measure male gens out of the box. Bummer. It does however have the ability to create custom measures so going that route.