AMBATS PRODUCT HIGHLIGHTS: 1. Provides a full range of motion that you can’t get from standard sit-ups, and isolates the abs for optimal workouts and results. 2. High density, durable foam gives comfort and the perfect amount of firm support for your back and spine while providing a challenge to your core muscles. 3. Dimensions: 15″ x 12″ x 2.5″; the compact design is one-size-fits-all and portable so you can carry it to the gym or even while traveling.