Hefty Strong, 18 Count, 39 Gallon, Lawn & Leaf Bag, 33" x 41". Yard cleanup is a tough job that requires a big trash bag you can depend on. Hefty Strong Lawn & Leaf Bags are ideal for collecting leaves, twigs, sticks and grass clippings. Whether you're looking for lawn baga to clean up after mowing, XL trash bag for construction debris, or leaf bags to clean up fall foliage, these 39-gallon 1.1 mil thick lawn bags are up to the task for all types of outdoor clean up.