3.3 Halfpipe

Length: Minimum 150 m (492 ft).; Width: 19–22 m (62–72 ft) from lip to lip.; Wall height: 6.0–7.0 m (19.7–23.0 ft), commonly referred to as a "22-foot superpipe" (measured as the vertical height of the transition wall).

Send this to your friend — argument over.