Our acid-free Dark Grey Suede matboards are 4-ply and feature a white core. With an overall size of 8.5x11, these mats with Oval openings fit perfectly into 8.5x11 frames and are bevel cut to showcase your 5x6 photos. Actual mat opening size is 4.5x5.5 inches so that it may safely and securely house your 5x6 photo, artwork, needlepoint, sign, etc. This pack includes 1 Single Matboard. Proudly made in the USA by Country Art House!