We claim the ornamental design for a foldable mirror, as shown and described.
FIG. 1 is a perspective view of the foldable mirror showing our new design in an open position;
FIG. 2 is a top plan of the foldable mirror of FIG. 1;
FIG. 3 is a bottom plan view of the foldable mirror of FIG. 1;
FIG. 4 is a left elevation view of the foldable mirror of FIG. 1;
FIG. 5 is a right elevation view of the foldable mirror of FIG. 1;
FIG. 6 is a rear elevation view of the foldable mirror of FIG. 1;
FIG. 7 is a front elevation view of the foldable mirror of FIG. 1;
FIG. 8 is a perspective view of the foldable mirror showing our new design in a closed position;
FIG. 9 is a top plan of the foldable mirror of FIG. 8;
FIG. 10 is a bottom plan view of the foldable mirror of FIG. 8;
FIG. 11 is a left elevation view of the foldable mirror of FIG. 8;
FIG. 12 is a right elevation view of the foldable mirror of FIG. 8;
FIG. 13 is a rear elevation view of the foldable mirror of FIG. 8; and,
FIG. 14 is a front elevation view of the foldable mirror of FIG. 8.
The broken lines included in FIGS. 3, 6, and 13 are for the purpose of illustrating portions of the foldable mirror that form no part of the claimed design.