This is a back supporter from Shimamura's CLOSSHI brand. The product description states that it helps to straighten your back and supports your posture comfortably and without strain. The applicable size is M. Height (approx.): 155-170 cm Chest (approx.): 77-87 cm Purchase price (including tax): 1,639 yen I ordered this M size as it was not available in the store. However, it didn't fit my height. The instructions state "Do not use if the size does not fit," so I have decided not to use it and am putting it up for sale. Thank you for your consideration.