I get 4ml 14 inch poly tube...50 pound roll. I have a heat sealer unit and make my bags about 52 inches long. Allows me to put any fish in whole and have enough to tie a knot at the end. I buy the roll in the fall and make the bags in my spare time at night during the winter months. Way cheaper and way better bags ...Industrial Plastics is $$$$$....I was looking for a plastic donation box for SVIAC and Industrial Plastics was $52.00, went around the corner to Matthews Supply and the exact same box was $29.95!!!