Medium grey works particularly well in spring and summer, paired with white or light blue shirts
100 Years of Fashion. Laurence King Publishing 2012
Different services in different countries have variations on this, but the basic principle is the same: you stand straight in your shirt, and if theres any loose fabric hanging on either side of you, you fold it into a sharp, diagonal crease, sort of like making the nose on a paper airplane
In the later part of the period, when hemlines fluctuated, the longer hemlines seem more often associated with an evening dress, which may indicate that the shorter lengths were for dancing, making it less likely for the woman to trip over her skirts
Tripp immediately sees it could be useful to her, and when Monica says she is going to have the dress dry-cleaned Tripp quickly dissuades her: You have a very long life ahead of you and you dont know whats going to happen to you