Choosing the shape of your bolster, as with many other decisions, boils down to personal preference. Let's start with the differences between the two styles:
But either shape bolster will provide support and stability and can be used in the variety of poses interchangeably. If you have the opportunity to try both at your local yoga studio, please do so. Use both in the variety of poses to see whether you are more interested in the stability of the rectangular bolster or the greater expansion you may get from the round, and so on. Keep in mind which poses you believe you will want to be incorporating into your home practice as well.
Browse all of our Yoga Bolsters in our More Yoga Props section.