On the Measurement Set tab of My Account, you'll see a box button called Measurement Set Library.
The Measurement Set Library contains measurement sets for common models. Some of these are virtual models and some are real.
For the virtual models you will find a measurement set for all of the default avatars in Marvelous Designer software.
Real world models include a realistic 11" doll and my own measurements (Lori). If you want to play with the program and see what it does, use my measurement set just for fun.
Add one of these sets to your measurement sets by selecting the copy button. A copy of the set will be placed in your account. You can edit it or delete it from there.