We claim the ornamental design for a balloon weight, as shown and described.
FIG. 1 is a top perspective view of a balloon weight showing our new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a right side elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a front elevational view thereof;
FIG. 6 is a rear elevational view thereof; and,
FIG. 7 is a bottom plan view thereof.
The structure depicted by broken lines in the FIG. 7 view has been shown for the purpose of illustrating portions of the claimed balloon weight that form no part of the claimed design.
Additionally, the broken lines in FIG. 7 define the boundary between claimed unclaimed portions of the balloon weight, the area within which forms no part of the claimed design.