JUNE TAILOR-Simple Circles Rotary Cutting Rulers. This collection of rotary rulers were designed specifically for making perfect circles. Make 6 sizes of circles from 4in to 9in; each ruler also features 90 and 45 degree markings for perfect 1/4 and 1/8 circle cuttings for building blocks; instructions for creating full circles; half circles; inset circles; and for using your new rulers to create applique. All rulers have a 1/4 inch seam allowance. Made of flexible; clear acrylic with black markings. Package size: 6-1/4x9-3/4x5/8 inches. Made in USA.