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: 6-1/4×9-3/4×5/8 inches. Made in USA.