A method of making a customizable gift box includes the step of providing a box blank including a box bottom and a plurality of sidewalls having adjacent lateral edges. Appendages are positioned to overlap and join the adjacent lateral edges of the adjacent sidewalls. Each appendage includes a first relatively narrow edge, a second relatively wider opposing edge, and S-shaped side edges joining the first and second edges. The configuration of the appendages facilitates their removal from a label assembly that includes a face sheet and a back sheet, the face sheet including a removable carrier portion, a removable label, and the removable appendages in the carrier sheet. Once the sidewalls of the box blank are properly anchored using the appendages, the label assembly can be aligned and the label can be adhered to the box blank.