Staff Answer
Aug 10, 2026 - 11:27 AM
Measure around the largest part of your head, about half an inch above the eyebrows and ears, then match it to Zamp's chart: Small is 56cm/22in, Medium is 58cm/22.83in, Large is 60cm/23.62in, X-Large is 62cm/24.4in, and 2X-Large is 63cm/24.8in. The Zamp RZ-63S is available from X-Small through 2X-Large. Don't guess — a snug, secure fit is required for the helmet to perform properly in an impact.
