It was in 1947 that George Nelson became inspired by a self webbing material used to moth-ball ships in New York and he convinced himself it would be perfect for lighting. He made a metal frame, tracked down the source of the webbing material and by the next day he created a big glowing sphere and the Bubble Lamp was born. 
 
Smal: 17.5" dia, 7" h
           45 dia, 18 h  cm
 
Medium: 25" dia 10" h
               63 dia, 25 h  cm
 
Large: 35" dia, 14" h
           90 dia, 35 h  cm
 
X-Large: 50" dia 22" h
               127 dia, 56 h  cm