I'm a jewellery designer. I use laser or chimical cut (out of a brass sheet), made by a subcontractor who needs vector files (.ai and .pdf files) for this numerical cut.
As unusual as it seems, I use to first make a physical prototype and then draw my final designs on a millimeter sheet, with "my own way" of noting quotes... I enclose an example of these designs, as well as an example of the final file I need to get.
I will have 10 designs to be vectorised.