MARTI MICHELL-Flying Geese Ruler. Use this ruler to make Flying Geese Units for blocks, borders and entire quilts! This package contains one 7x9-1/2 inch triangle ruler. Made in USA. WARNING: This product can contains chemicals including Poly(methyl methacrylate), which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.