Thank you for viewing. This is the Maruko Sangyo Back Rescue Belt Titanium Mesh, a corset for lower back pain. I purchased it several years ago and used it whenever I had lower back pain. A "Hytrel®" resin Back Rescue Plate is built into the lower back area. I purchased size M, but it has stretched slightly due to use and age. It still has sufficient support, so I believe you can still use it, but please understand that it is a used item before purchasing. It will be shipped via Yu-packet. Adjustable lower back pain belt - Velcro: Approximately 19cm - Flat measurement: Approximately 88cm