Side-Mount Self-Stick Plastic Index Tabs Nos 11-20Heavy-duty plastic tabs won't curl or tear. Easy to read, just attach the to side of the page. Includes blank "write-on" tabs; preprinted numerical and alphabetical tabs. Permanent adhesive. 1" x 7/16". 11-20. File Insert/Tab Type: Adhesive File Folder Tabs; Color(s): White.