Abstract: Disclosed herein is a detachable waist band expander for temporarily adjusting the waist band size of a garment. The user attaches the waist band expander to the button and the button slit of their clothing. The present invention includes an optional sized button which is inserted into the button slit of the waist band of the garment as a button hooking device engages the button of the garment. Hook and pile inserts serve as a size adjustment means.