Kopykake 11 x 17" Frosting Sheets (1/2-sheet cake size). The wafers are on an 11 x 17" Tabloid-Size backing sheet with a 10-1/2 x 16-1/2" printable area. This is the largest frosting sheet size on the market and is large enough to cover the majority of the surface of a 1/2-Sheet cake. To use the Kopykake #FS1117-T, the user must have a large format printer like the Canon PIXMA iX6520 or the Canon PIXMA iX6820. PLEASE NOTE: IN ORDER TO MAKE IT EASIER FOR CUSTOMERS TO TAKE ADVANTAGE OF CASE PRICING, OUR CASE SIZES ARE NOW 15 BOXES RATHER THAN 30 BOXES.