Abstract: An adjustable fastener assembly for forming an adjustable loop around a portion of a wearer's body has an elongate member for encircling the body portion and first and second ends. A pair of rings are secured to the first end, and the second end is in releasable threaded engagement through the rings with the free end on one side of the loop. Secondary fasteners such as mateable strips of Velcro.RTM. material are provided on the opposing faces of the free end and face of the loop so that the free end can be secured to the loop. The elongate member may be a belt or waistband, a collar for an animal, or a hat band or sweatband of a cap or hat.