How to Choose the Right Leash Length for Your Board

Your leash is the one piece of gear that decides whether a wipeout costs you a few seconds, or your whole session chasing a board down the beach. Here's how to get it right.

The golden rule: match your board, then go one better

Your leash should always be at least as long as your board. If you're stuck between two sizes, take the longer one — a slightly long leash is a minor annoyance, a slightly short one means your board can snap back at you.

Cord thickness matters more than people think

• 5mm (Lite) — built for competition and small waves, minimal drag
• 6mm (Medium) — your everyday leash, right for most surfers most sessions
• 7mm (Standard) — bigger boards, bigger waves, more strength where you need it
• 8mm (Heavy) — big wave sessions or flat-water SUP paddling

By board type, roughly:

• Short boards (5'0″–7'0″): a 5mm or 6mm leash, depending on whether you're chasing performance or just an easy paddle
• Mid-length (6'0″–7'6″): step up to 7mm for the extra strength these boards need
• Longboards (7'0″–10'6″+): 7mm, with a choice of ankle or knee cuff — purely personal preference
• Bodyboards: wrist or bicep cuff, both 7mm — wrist is the most popular, out of your way while you swim
• SUP: a coiled 8mm leash keeps things tidy on flat water