In addition to the guidelines provided by the article, the author has made available a template for creating different types of enclosures (Clamshell Box, Wrapper, Phase Box, Box with Lid, Slipcase, 4 Flap Folder and Portfolio) which is now available to download.   Instructions for working with the Template: - Only enter data under the heading Enter Record Measurements. If the other cells are altered, the results can become skewed. - The formulas on each sheet are protected with a password to prevent accidental alteration. If you wish to customize the sheets, go to Tools - Protection - Unprotect Sheet on the toolbar. When you are prompted for a password insert: ‘box’. - After making your own alterations, go to Tools - Protection - Protect Sheet and re-enter the password to protect the sheet again.