As it is with Haute Couture, this particular branch of fashion design comes in pieces uniques all made by hand, meaning that its looks are (re-)created only for special occasions (Lady Gaga wore Schiaparelli for her performance at the Inauguration of President Biden f.ex.) and sold to especially wealthy clients (one look can cost up to several tens of thousands of Euros).
Now we do all agree, that Roseberry creates marvelous pieces of art at Schiaparelli, but how are we supposed to wear it if we cannot ever afford it, you might ask yourself.