Abstract: A Christmas tree disposal casing, having an upper end and a lower end, and a first panel and a second panel that each have an inner edge, an outer edge, an upper edge, and a lower edge. The casing has a flat configuration and also has a sleeve configuration for encasing a tree therein when the first panel is joined to the second panel at or near their outer edges. An expansion panel is affixed near and extends between the inner edges. The inner edges are selectively joined directly together along an expansion seam. When the expansion seam is opened, the expansion panel provides additional circumference to the casing for holding larger trees. The outer edge of the first panel is selectively joined to a secondary zipper edge on the second panel, located inwardly of the outer edge of the second panel, to reduce the circumference of the casing.