I must look for the Creative Grids. No slip is my goal. As for the differences in the measurement of 1 inch. As a rule when I am working on a project I test the rulers I am using to make sure they measure up with each other. I have also found that I need to prewash or super steam all my fabric and press it before cutting so I don't get any surprise shrinkage when pressing --used to blame the rulers I was using then discovered the measureme3nts were the same it was shrinking in the process no matter how accurately I was cutting the pieces.