Posture Correction Belt M size I purchased this online and used it a few times, but it didn't fit my body, so I'm selling it. It's not stretchy, but you can adjust it with the length of the belt. It has been cleaned at home (hand-washed). Size Width across the center of the back: 15 cm Length down the center of the back: 11 cm Belt length: 55 cm *Please note that there may be slight variations. ☆When shipping, I may use recycled paper.