WHICH LENGTH?

Rope	Recommended length
Mainsail halliard Jib halliard Spinnaker halliard Mast height x 2.5 Jib sheet Spinnaker guy Boom vang Cunningham	Mast height x 2.5 Mast height x 2 Mast height x 2.5 Vessel length x 2.5 Vessel length x 1 Vessel length x 2 Boom length x 2 Boom length x 1

CAUTION: these are average lengths, but you should measure your old ropes to find the exact lengths you require.

WHICH DIAMETER?

VESSEL LENGTH	SHEETS (mm)			HALLIARDS (mm)
	Mainsail	Jib	Spinnaker	Mainsail	Jib	Spinnaker
Dinghy/Catamaran
Light dinghy 2 to 4 m	8	6	5	4 to 5	4 to 5	4 to 5
Light dinghy 4 to 6 m	8	8	6 to 8	5 to 6	5 to 6	5 to 6
Racing catamaran 4 to 6 m	8	8	6 to 8	5 to 6	5 to 6	5 to 6

Sailing
6 to 8 m	8 to 10	8 to 10	8	8 to 10	8 to 10	8 to 10
9 m	10	10	8	10	10	10
10 m	10	10 to 12	10	10 to 12	10 to 12	10
11 m	12	12	10	12	12 to 14	10 to 12
12 m	12	12 to 14	12	14	14	12
13 m	12	14	12 to 14	14	14	12
14 m	12	14	14	14	14	12 to 14

DON'T FORGET:

-Mitts protect your hands from friction burns when manoeuvring.

DECATHLON'S advice

Hose down your ropes regularly, especially after exposure to sea water or spray. Do not spray high pressure washer jets too close to your ropes and do not use detergents; this dries them and makes them less easy to use.

Thematic: advice on how to choose ropes.