ISA

Key Fact: Surfboards must be deemed safe by Head Judge and equipment inspectors.

Board type: Shortboard. Typically 5'6" to 6'6" (168–198 cm) in length, though the ISA does not enforce strict minimum or maximum dimensions. The board must be deemed safe by the Head Judge and equipment inspectors.; Fin configuration: Three-fin (thruster) setup is standard, though quad-fin and tw...

A leg rope (leash) is mandatory in all ISA competition. The leash connects the surfboard to the surfer's ankle or calf via a Velcro strap.

Color-coded lycra rashguard jerseys are provided by the organizer and must be worn at all times during the heat.; Standard colors: Red, White, Blue, Yellow (in 4-person heats) or Red and Blue (in 2-person heats).; The jersey must be worn as the outermost layer over any wetsuit or rashguard.

Wetsuit: Optional, dependent on water temperature. No restrictions on thickness, style, or brand. Full suits, spring suits, and vests are all permitted.; Helmet: Optional for most conditions, but may be required by the Competition Director at reef break venues (e.g., Teahupo'o) where shallow reef...

All surfboards and leashes are subject to inspection by the Equipment Inspector prior to competition. Boards deemed unsafe (sharp edges, damaged fins, protruding hardware) will not be permitted.

Competition takes place in the open ocean on natural waves. Venue selection is a critical process that considers wave quality, consistency, safety, spectator access, and logistical feasibility.

Competition takes place in the ocean on natural waves.

Boundaries: The competition area is defined by colored flags on the beach and buoys or markers in the water. Surfers must stay within the designated zone during heats.; Lineup area: The zone where surfers wait for and paddle into waves, typically 50–200 meters offshore depending on the break.; Ta...

Minimum wave height: Approximately 1 meter (3.3 ft) face height for competition to proceed. Conditions below this threshold result in a hold or postponement.; Ideal range: 1.5–3 meters (5–10 ft) for shortboard competition. Larger waves are permissible if deemed safe by the Competition Director.; ...