Getting the exact size and contour shape of your workpiece are essential for creating a jig layout. Fortunately, there are a few ways to achieve this:
Idea #1: Measure
If the outline of your workpiece is a simple, geometric shape, it is a good idea to measure the shape and trace it in your graphics program.
Idea #2: Scan the workpiece and trace it
If your workpiece consists of complex angles and radii, such as a heart shaped pendant for instance, try scanning the workpiece into the computer and then, import the scanned image into your graphics program and trace the contours.
For items too large or bulky to scan, transfer the contours to pen and paper - or try taking a top-down photo of the workpiece.
Once the image is in your graphics program, trace around the workpiece and adjust the scale accordingly to ensure accurate size representation of your workpiece.