Picture frame

FIG. 1 is a perspective view of a picture frame showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is top view thereof, the bottom view being identical;

FIG. 4 is a left side view thereof, the right side view being identical;

FIG. 5 is a perspective view of a second embodiment of a picture frame showing my new design;

FIG. 6 is a front view thereof;

FIG. 7 is a top view thereof, the bottom and side views being identical; and,

FIG. 8 is a left side view thereof, the right side view being identical.

The rear view of each embodiment forms no part of the claimed design. The broken lines shown in FIGS. 1, 3, 4, 5, 7 and 8 represent environmental subject matter and form no part of the claimed design.