I bought a chair from Target that resembles the Ikea Poang armchair. I like it, but the site showed it was "tan" and it's actually "natural" or almost white. I would like something darker, but the company that makes it only has black as an alternative. I figure the covers for the Ikea Poang are pretty close - the width is the same at least. Would someone who has the Poang mind taking measurements of the pad, in particular the length of the segments for the seat and back area? Thanks.