How can I tell if a Barcelona chair is real?

To spot an authentic Knoll Barcelona chair, first check the back cushion to make sure it retains its shape and doesn’t sag. The chair should be slightly taller than its steel frame and curved in shape. The upholstery should be excellent and even, with no signs of improper workmanship. For vintage chairs, look for a Knoll sticker or label on the bottom cushion. For chairs made after 1996, check for a “Knoll Studios” stamp on the frame. Shop authentic Knoll Barcelona chairs on 1stDibs from some of the world’s top sellers.