Northrop Grumman designed the sunshield for NASA.[18] The sunshield is designed to be folded twelve times so it can fit within the Ariane 5 rocket's 4.57 m (15.0 ft) diameter by 16.19 m (53.1 ft) shroud. When it deployed at the L2 point, it unfolded to 21.197 m × 14.162 m (69.54 ft × 46.46 ft).