The ornamental design for a footballshapedbox, as shown and described.
FIG. 1 is a perspective view of a football shaped box according to the design;
FIG. 2 is a perspective view thereof, in a partially opened position;
FIG. 3 is a top view of the present design;
FIG. 4 is bottom view of the present design;
FIG. 5 is front view of the present design;
FIG. 6 is a side view of the present design;
FIG. 7 is a back view of the present design; and,
FIG. 8 is a plan view of an unfolded two dimension blank of the present design. The broken line portion in the FIG. 8 drawing of the present design is included to show the fold indentations.