COSTUME PARTY: Having just launched a line of small leather goods on their e-commerce site, Proenza Schouler’s Jack McCollough and Lazaro Hernandez are working on a costume jewelry line they hope to launch during the upcoming pre-collection season. The design duo, who were on the jury at the Hyères International Festival of Fashion and Photography in the south of France over the weekend, said it would be a season-less, classic line that will be reprised each season in different colors and materials. “It’s nice when you’ve put so much time into developing a product for it to have a life. So much stuff that we put out there, three months later, it’s gone,” said McCollough. The jewelry line is still in its prototype stage.