Exercise Ball

FIG. 1 is a perspective view of an exercise ball.

FIG. 2 is a front view of the exercise ball of FIG. 1 .

FIG. 3 is a right side view of the exercise ball of FIG. 1 .

FIG. 4 is a left side view of the exercise ball of FIG. 1 .

FIG. 5 is a back view of the exercise ball of FIG. 1 .

FIG. 6 is a bottom view of the exercise ball of FIG. 1 ; and,

FIG. 7 is a top view of the exercise ball of FIG. 1 .

The broken lines in the drawings illustrate portions of the exercise ball that form no part of the claimed design. The contour lines form no part of the claimed design.