Diamond Core Shrink Ruler
DiamondCore® Tools offers the unique Shrink Ruler, a flexible, two-sided plastic measuring tool designed for potters to gauge clay shrinkage with four clay shrinkage percentages, making it indispensable for precise projects like teapot lids and cookie jars.
The photos show both sides of the same ruler. One side shows 6% and 10%, the other side shows 12% and 14%.
Also includes standard metric ruler.