The best profit will come from regular customers, because the dressmaker will have learned how to find the styles they like, how to design for them, and how to fit them, and all this knowledge will make it possible for her to produce better garments with less labor.
This advice comes from a 1924 volume, yet it is just as sound today as it was then. I know members of the Association of Sewing and Design Professionals who make the wardrobes of corporate women. Once the customer has worked out a certain cut of pants or jacket as their favorite, they will have more than one made for different seasons, etc. And many women do the same with ready-to-wear: they find one garment that fits perfectly and buy it in multiples or more than one color. As a dressmaker, I have made the same favorite patterns, tweaked to my satisfaction, over and over again.
The Dressmaker and Tailor Shop is one of the Woman’s Institute of Domestic Arts and Sciences correspondence course booklets on a complete course on sewing, all of which were first written by Mary Brooks Picken. She was the first woman to write a dictionary, The Language of Fashion, which is still in print and very useful for vintage terms, and co-founder of the Costume Institute which is now part of the Metropolitan Museum of Art.
You can find the ASDP here in case you are searching for custom clothing, or certification as a professional: https://sewingprofessionals.com/








