Find cross back chair ads in our  Chairs category. Buy and sell almost anything on our site. Cross Back Chairs to match your unique tastes and budget. If you’re looking for dining chairs, but aren’t sure which ones to buy, you should definitely consider cross-back dining chairs. Also known as X-back chairs, these beauties were originally found in 20th century French cafés. They are similar to, but instead feature two slabs of crossed wood, as opposed to the round arches. I…