MTG Style Body Make Seat Style - Brown Pelvic Support Chair for Posture Correction Product Number: BS-ST1917F-B Size: Approximately 420mm x 390mm x 330mm Purchased from an authorized retailer. Used for several months, and there is a stain-like mark on one part (bottom right of image 1), but otherwise, it is relatively clean. Please understand that this is a used item, and only those who are comfortable with this should purchase it. Thank you for your consideration.