1. sail
1.1. size
1.1.1. 3.5 - 4.5
storm (30kt+)
1.1.2. 4.5 - 5.5
nice wind (25-30kt)
1.1.3. 5.5 - 6.5
wind (20-25kt)
1.1.4. 6.5 - 7.5
lighter wind (15-20kt)
1.1.5. 7.5+
super light wind (0 - 15kt)
1.2. luff
The total length of the "front" side (the part into which the mast is inserted).