Stewart Prices Calculator (Excel Files) In this Excel worksheet enter your custom screen size (up to 12'x16')* and get the cost of your screen Please add 0.25' to the image size For example: 6 'x 8' image size is 6.25' x 8.25' Overall Dimension For Macintosh Download Excel 4.0 file (2K) For PC Download Excel 4.0 file (5K) For Opta / OptaWave Click Here You must have Excel 4.0 or higher on your computer *For screens larger than 12'x16' call or e-mail. This formula is only for AT-1.5 frame not strong enough for the larger screens.