The LaserPerformance web page ( http://www.laserperformance.com/main/index.php?option=com_content&task=view&id=4&Itemid=91 ) has a chart here ( http://laserperformance.dorydesigns.com/main/images/stories/pdfs/Sunfish/sf_specs.pdf ) Rope - Metric Equivalents (conversion is not exact) 1/8" = 3 mm 3/16" = 5 mm 1/4" = 6 mm 5/16" = 8 mm 3/8" = 10 mm 7/16" = 11 mm 1/2" = 12 mm .
