The Athletic Works Pilates Magic Circle is a versatile exercise aid you can use anywhere. The Black and Blue soft rubber ring provides resistance during your workout to target, tone, and strengthen your body. This 12 inch diameter ring with a soft outer cover is an excellent solution for problem areas like inner and outer thighs, upper arms, and chest. Use as an arm hoop for a fun workout to tone triceps, biceps, and shoulder muscles. Workout guide included. Pilates Magic Circle Dimensions: 12" L x 12" W x 1.25" D. Product Weight: 0.75 lbs. Model #: WMAW-050744-RC