FIG. 1 is a front perspective view of the dumbbell holders of the present invention; FIG. 2 is a back view of the dumbbell holders of FIG. 1; FIG. 3 is a front view of the dumbbell holders of FIG. 1; FIG. 4 is a side view of the dumbbell holders of FIG. 1, the other side view being an identical image; FIG. 5 is a top view of the dumbbell holders of FIG. 1; and, FIG. 6 is a bottom view of the dumbbell holders of FIG. 1.