Rainbow Jig - 3 in 1Our Rainbow Jig is the perfect tool for creating beautiful polymer clay rainbows. The white acrylic makes it easy to see your design and create your colour palette. It comes with three different sized jigs so you can choose the one to best fit your project (measurements are shown below). Great for creating rainbow earrings or keychains. All three jigs are a height of 23mm with the following widths: Small 3. 5mm Medium 7mm Large 9mm