Watch & Comment Live... The 2024 Met Gala
You would have to know how to measure yourself properly
and may even need someone else to do it for you.
.
Next big part comes into play, what if any fit guarantee comes into play? If the item arrives, does not fit right, who is responsible for making it right as well as who covers shipping as well is there a point where it is decided it is just not worth it.
Body awareness also comes into play. With custom pieces it is easy to try and pattern one piece to different measurements but it just does not work. Especially for fitted garments, there are definitely certain lines that come into play and if the proportion ratios shift too much, the look just is never there.
I personally have seen some custom pieces take four months to get completely resolved satisfactory. In many ways, off the rack and having a solid tailor to really fit the piece is far better.
Just an idea though
In her younger days my instructor used to only work for individual clients, and sometimes she never measured them but instead asked for a garment they owned, of which the fit they really liked. And she would just copy that
I agree even if you have the person's measurements, it doesn't ensure the garment will look good on them because the whole thing is based on proportion and using your eyes to judge what looks best to the person's figure.