Abstract: A method for making tubular plastic material having shaped interlocking profiles thereon for use in reclosable bags by cross-cutting and sealing the material to form the individual bags. The tubular material is made in different diameters of tubes to form bags of different depths, and the speed of delivery of the plastic material and the rate of inflation and delfation is controlled to determine the diameter of the tubing, while the plastic delivery to the profile portion of the die is separately controlled and maintained at a rate, so that, for different sizes and gauges of tubing, the profile will be maintained constant thereby obtaining a profile of optimum size and providing for bags which can be varied in size, but which can each accommodate the same closing and opening slider which fits over the profiles. This method of extruding profile tubes requires fewer changes in extrusion dies.