C&T PUBLISHING-Magic Design Ratio Tool. Instantly improve your design skills and eliminate the guesswork with this handy ratio tool. Quilters, photographers, artists and designers of all kinds will appreciate the ease and efficiency of the slide chart. Once you know the desired shape and length of one side this tool will quickly tell you the other dimension based on your chosen ratio. Complete instructions are included. 8-1/2x5-1/2 inches when folded, expands to 8-1/2x27-1/2 inches. Imported.