The ornamental design for a casing for earphones, as shown and described.
FIG. 1 is an upper perspective view of the casing for earphones showing my design in an assembled configuration with the earphones is broken lines.
FIG. 2 is a top plan view of the casing in the assembled configuration with the earphones in broken lines;
FIG. 3 is a bottom plan view of the casing in the assembled configuration with the earphones in broken lines;
FIG. 4 is a side elevation view of the casing in the assembled configuration with the earphones in broken lines;
FIG. 5 is an opposite side elevation view of the casing in the assembled configuration with the earphones in broken lines;
FIG. 6 is a front elevation view of the casing in the assembled configuration with the earphones in broken lines; and,
FIG. 7 is a rear elevation view of the casing in the assembled configuration with the earphones in broken lines.
The drawings show the design of casing for earphones for reducing tangles of the earphones. The broken lines in the drawings form no part of the claimed design.