How big are the waves in big wave surfing?

In order to qualify as "big wave" surfing, a surfer needs to tackle waves that are at least 20 feet high. Surfers who wish to surf big waves can either paddle out into the wave on a larger board or be towed in on a smaller board with the help of a jet ski.

There are some risks associated with big wave surfing, including the potential danger of falling off the board, or wiping out, on a breaking big wave, which can result in the surfer being pushed as far as 50 feet under the water's surface. This can lead to disorientation and suffocation or drowning.