The ornamental design for a strap for a garment, as shown and described.
FIG. 1 is a front view of a first embodiment of a strap for a garment according to my new and ornamental design;
FIG. 2 is a front view of the left-most strap for a garment shown in FIG. 1, wherein the rightmost strap for a garment is a mirror image;
FIG. 3 is a back view thereof;
FIG. 4 is a left side view thereof, wherein the right side view is a mirror image;
FIG. 5 is a front view of a second embodiment of a strap for a garment according to my new and ornamental design;
FIG. 6 is a back view thereof;
FIG. 7 is a left side view thereof, wherein the right side view is a mirror image;
FIG. 8 is a front view of a third embodiment of a strap for a garment according to my new and ornamental design;
FIG. 9 is a back view thereof; and,
FIG. 10 is a left side view thereof, wherein the right side view is a mirror image.
The broken line showing of a garment in FIG. 1 and the broken line showing of portions of a garment in FIGS. 2-10 are for purposes of illustrating the environment in which the strap for a garment may be used; the broken lines form no part of the claimed design. The broken lines at the upper and lower ends of the strap for a garment in FIGS. 1-10 are for purposes of illustrating the bounds of the claimed design; the broken lines which define the bounds of the claimed design form no part thereof.