Apparatus for forming a band into a persistent loop. The band incorporating the apparatus has a hole portion which contains a hole, a tongue portion which fits through the hole, and an adhesive attachment area on one or both of the hole and tongue portions. The band is made into a persistent loop by drawing the tongue portion through the hole and attaching the adhesive attachment area to the loop's outside surface. The size of the loop may be adjusted by varying the amount of the tongue portion which is drawn through the hole. A loop may be temporarily preformed by engaging a structure on the tongue portion with the hole. In embodiments in which the band is made of stiff material, the engaging structures may be the edges of the tongue portion and the edges of the hole. The disclosed embodiment of the apparatus is an identification band.