Sleeve with corner tabs

A sleeve for holding papers or other material may be provided with an outer corner tab. The sleeve may be formed of a single die-cut sheet of plastic or other material, or from two or more sheets that are attached together. A first sheet may include score lines along two adjacent edges that enable an extended portion of the first sheet to be folded over a second sheet. The second sheet may include score lines that enable an outer corner tab to be formed thereon. The corner tab enables a portion of the papers or other material stored in the sleeve to be inserted into an insert space of the tab. The tab may then be used to retain papers in a secure manner, such that they will not fall out of the sleeve should the sleeve or folder be inverted.