Good Measure Every Clamshell Ruler LongArm/High Shank Amanda Murphy
Good Measure by Amanda Murphy - Every Clamshell Template Set of 2pcs. Allows you to make 1in, 2in, 3in and 4 inch Clamshells. It has markings that clearly indicate the previous row's quilting lines, which no one else has. All with non-slip backing.