Keep children, pets, crew and gear on board with diamond mesh nylon safety netting. Reinforced top and bottom selvages. For a professional, easy installation, use netting clips (one bag of 50 clips for each 5' of netting installed.) HOW TO MEASURE: Determine the height of your installation. Select multiplier. 12-16"=1.1, 18-20"=1.2, 22"=1.3, 24"=1.4, 26"=1.5, 28"=1.7. Multiply the length of your installation by the multiplier. Add 10% for error. This will equal the amount of netting to purchase. EX: 19"H x 22'L (22' x 1.2)=26.4 + 2.6'(10%error factor)=29' of netting.