The ornamental design for a bowl for balance, as shown and described.
FIG. 1 is an elevational view, from a first side, of a bowl for balance, showing our new design, the elevational views at 90° intervals from this side being identical;
FIG. 2 is a top plan view thereof;
FIG. 3 is an elevational view thereof from a second side offset 45° from the side shown in FIG. 1, the elevational views at 90° intervals from this side being identical;
FIG. 4 is a bottom view thereof; and,
FIG. 5 is a top perspective view thereof from the side shown in FIG. 3.
The balance shown in broken line is a representation of environmental structure forming no part of the claimed design.