Because it's absolutely essential that rulers print out exactly, the rulers are in PDF format. Both colorways to be printed on one sheet of cardstock in US letter and A4 format. The rulers are 3 inches wide and 10 inches long marked in both cms and inches. I suggest either laminating or spraying with clear acrylic.
Right click and save the US Letter format rulers HERE.
Right click to save the A4 format HERE.
I also posted a memory wire charm bracelet project at BellaOnline.