tag surface is exploited the tags are made according to the invention starting from a paper sheet coated at one side with thermosealable material such as for instance polypropylene by punching the paper sheet as shown in fig1 and cutting out the cross hatched zones the sheet is then cut along the dotted lines of fig1 to obtain a series of first strips 1 see fig2 each provided with perforations of teeth 2 set spaced apart from one another by an indention between each strip 1 formed by the punched out zones a cotton thread 3 see fig3 located on the side of the polypropylene coated strip advances parallel to each strip 1 teeth 2 are then folded one at a time in correspondence of the line dots and dashes 4 by means of a heated bar that makes the two polypropylene layers contemporarily adhere to each other so as to hold the thread therebetween at the same time or after each perforation 2 has been folded about the thread the strip 1 is cut in correspondence of the dotted lines 5 to the purpose of taking off the just made tag the later can thus be pulled away by the thread which advances at a higher speed than that of the strip of paper there are thus obtained a series of threads to which a plurality of conveniently spaced apart tags are attached as shown in fig4 part of the surface of each tag 13 shown at 16 in fig4 is.