Abstract: A method of, and apparatus for, wrapping packages of different sizes in thin-gage film and heat sealing the film includes transporting the package at the same horizontal level through the machine, pulling the film down across a horizontal in-line package path to form a vertical wall of film, pushing the article along the path forwardly into the wall of film, forming a tubular loop of film about the package with the loop open at the rearward end, severing the film, closing and sealing the rearward end of the loop, stretching, and/or underfolding the film, and heat sealing the package. The length of film needed to wrap packages of randomly different sizes is sensed and fed automatically. A trailing-end portion of over-lapping film of preselected fixed length, irrespective of the size of the particular package, is provided at the rearward edge of the package. This over-lapping trailing portion is heat sealed and then pushed against the back of, or under, the package.