There have been some very large paperweights made for special displays. Josh Simpson made a 100 pound (12 plus inch diameter) planet paperweight for the Corning Glass Museum. He also offers smaller versions for sale ranging from marble size to megaplanets ranging up to 9 1/4". There was a 6 1/2" diameter megaplanet on display at the May 2024 Paperweight Collectors Association convention in Providence, RI (USA). I think the weight was 15 or 16 pounds. Some collectors have bought extra large paperweights in Murano. It takes a strong arm (more likely arms) and special equipment to make anything over 6". When Josh made the 100 pound weight, he had to upgrade his studio equipment to handle the larger size and longer duration annealing required. I have a couple of very large paperweights... I need to measure them.