A zipper teeth and top stop arrangement includes a zipper tape, a row of teeth injection-molded on the zipper tape, a slide sliding on the row of teeth, and a top stop injection-molded on the zipper tape and space from a first tooth of the row of teeth by a gap for stopping the sliding from escaping out of engagement with the zipper tape, wherein the first tooth of the row of teeth has an upper tooth body and a lower tooth body respectively disposed at top and bottom side of the zipper tape, the upper tooth body having a backward opening and a springy free arm suspended between the backward opening and the gap to stop the slide from escaping out of engagement with the zipper tape, the springy free arm being forced downwards by the slide for enabling the slide to be moved into engagement with the zipper tape during installation, the lower tooth body having a sloping top edge sloping backwardly downwards for guiding the slide into engagement with the zipper tape during installation of the slide in the zipper tape.