The ornamental design for a case for storingsmallitems, as shown and described.
FIG. 1 is a left front perspective view of a case for storing small items with modules showing our design;
FIG. 2 is a top plan view of the case for storing small items with the modules of FIG. 1; and,
FIG. 3 is a left side perspective view of the case for storing small items with the modules of FIG. 1.
The broken lines showing portions of the modules are included for the purpose of illustrating portions of the article and form no part of the claimed design.
The undisclosed rear, right and bottom views are unclaimed subject matter.