Pilates Mats are much thicker than yoga mats. Thickness is important in a Pilates mat because many of the exercises involve lying on your back, sides or stomach. This mat will help cushion your body (and spine) during movements that involve rocking and rolling up from a supine position. Like yoga mats, they have non-slip surfaces that are easily cleaned, and roll up for storage and easy carrying. Provided that your mat is Pilates-specific and a bit thicker than a standard yoga mat, prices start around $30.
You can find a variety of exercise mats from online retailers, at sporting goods stores, and in the fitness sections of most general retail stores. To ensure the effectiveness and safety of your workouts, make sure you're using the right mat for the job.