According to Official Guinness Records,
The largest sculpture made from recycled materials measured 26.8 m (87 ft 11 in) in length, 18.4 m (60 ft 4 in) in width and 8.66 m (28 ft 6 in) in height, and was achieved at an event organised by the Kuwait Association of Engineers and Fiesta Kuwait, in Kuwait, on 20 November 2011.
The sculpture represented a hard hat (the type of helmet used in workplace environments) and engineering tools.
For a complete list of 2011 records, please visit 2011 Guinness Records in Kuwait.