Our acid-free Metallic Gold matboards are 4-ply and feature a white core. With an overall size of 6x9, these mats with Oval openings fit perfectly into 6x9 frames and are bevel cut to showcase your 3x5 photos. Actual mat opening size is 2.5x4.5 inches so that it may safely and securely house your 3x5 photo, artwork, needlepoint, sign, etc. This pack includes 1 Single Matboard. Proudly made in the USA by Country Art House!