This back brace is great for a lower back pain but it gets very uncomfortable after prolonged use. I tend to not use this as much as intended, and opt in for pain relief patches instead, especially if I am going to be sitting on the couch or chair for some time. The tension strap is really great though. You can easily adjust the amount of tension the brace would have. I feel this would fit all body sizes and shape because it is quite adjustable.