Abstract: A ribbon which is knitted for reinforcing a hollow element has at least two knitted ribbon parts which are connected to one another by at least one continuous weft thread which is laid in repeated loops, wherein the weft thread is tied up firmly into the respective ribbon part in fastening sections which change from ribbon part to ribbon part. In dividing sections between said fastening sections, the weft thread is guided to and fro in weft thread loops between the ribbon parts, wherein the loop heads of the weft thread loops are arranged releasably and stretchably on the ribbon parts. As a result, it is possible to produce the ribbon in a relatively small width and to widen it substantially for later use by releasing and stretching the loop heads.