Mats may be purchased as an additional option to your frame presentation or as an individual mat order. In the matting section of the website, you may choose to order pre-cut mats (available in standard sizes), custom-cut mats, or bulk mat sheets (available in boxes of 16). Currently, the largest mat size offered on our website is 32" x 40" (outside dimensions). If you would like to order an oversized mat, please call Customer Care at 800-332-8884.