Abstract: An adjustable waist hand fastener disclosed comprises two components, namely, a button and a plate which can be fixed to one end portion of a waist band. The plate has a slot running along it. The button passes through the slot and can be displaced along the slot. The structure is such that the button can be fixed in any one of a number of positions along the slot. The button can be positioned in two or more predetermined positions or be infinitely adjustable. The button can be a one part construction or comprise two parts. When a two part button is used, the stem of one part is pushed through the slot before the two parts are connected together. When a one part button construction is used, the button must be capable of passing through the slot when in an appropriate position of orientation. The other end portion of the waist band includes a buttonhole which the button fits. The fastener enables the length of the waist band readily to be increased or decreased by displacing the button along the slot.