Already for a couple of days jewellers are making diamond (possibly paste?) rings, what ressemble earrings: these rings are made to be threaded through a practical eyelet in the sleeve of a pretty woman, to gather and lift that sleeve with grace:
It's a famous painter who thought this fashion up.
Sadly LeMésangère doesn't share with us, what painter. But as Mme Vigée Lebrun painted Mme Vestris with such a sleeve decoration, I think it was already wider spread in 1803, and made its way out from the pages of a journal where it has already been publicised earlier to the canvas of expensive and famous painters.
Description of the nmwa webpage: The identity of this woman is far from certain although some scholars believe that she might be Anne Catherine Augier Vestris (1777–1809), a French dancer who went by the stage name Aimée. Anne Catherine was the wife of dancer Auguste Vestris, who came from a famous family of performers.
An 11, Tunique de Grande Parure