How to determine the bag size you need:
Measure the package around its widest point, add 10% to the number, then
divide by 2 to determine the width of the bag. For length of the bag
measure around the package's tallest point, add 10% to the the number,
then divide by 2. If the size you need is not available, a larger size
may be used because the PVC shrink bag has a 50% overall shrink ratio.
Shrink bags are easy to use: