The present invention relates to a device for measuring an object, comprising a winder of a measuring element arranged to form a loop about the said object, which has at least one wall and an exit opening arranged to allow the exit of at least one unwound portion of the said measuring element, which is defined between the said exit opening and a distal end of the said measuring element, which is provided with a connecting element that abuts against the said exit opening, and a connecting means being located at a distance d from the said exit opening, characterised in that the said connecting means is located on the said at least one wall, is adjacent to the said exit opening, is presented in the form of a protrusion which extends towards the said distal end, and is arranged to receive the said connecting element in a stationary manner.
