Hi gimpygardner,

Welcome to the Community and I am glad that you enjoy it! Sadly, as in real life, not all retailers produce their garments in all sizes, however, when you go into the "Create a look" section, the results are filtered according to your model's size, so you should be able to try-on every garment there. Also, in the Quick 3D section (http://www.mvm.com/cs/looksGallery/quick3D.aspx) all garments are done in all sizes, so you can try them all on!

Hope this answers!
-Emma-