The ornamental design for a frame, as shown and described.
FIG. 1 is a top view of my new design for a frame;
FIG. 2 is a first side view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a second side view thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is a back side view thereof;
FIG. 7 is a perspective front view thereof, with a dashed line call out identifying a portion of the frame which will be illustrated in detail in FIG. 9;
FIG. 8 is a perspective back view thereof;
FIG. 9 is an enlarged partial view of FIG. 7;
FIG. 10 is an enlarged detail view of FIG. 9; and,
FIG. 11 is a further enlarged view of FIG. 9.
Only one corner of the frame has been shown in detail, however, all four corners are symmetrical, as illustrated.