Our acid-free Textured White matboards are 4-ply and feature a white core. With an overall size of 6x8, these mats with Oval openings fit perfectly into 6x8 frames and are bevel cut to showcase your 4x5 photos. Actual mat opening size is 3.5x4.5 inches so that it may safely and securely house your 4x5 photo, artwork, needlepoint, sign, etc. This pack includes 1 Single Matboard. Proudly made in the USA by Country Art House!