Our acid-free Charcoal matboards are 4-ply and feature a white core. With an overall size of 22x28, these mats with Oval openings fit perfectly into 22x28 frames and are bevel cut to showcase your 19x25 photos. Actual mat opening size is 18.5x24.5 inches so that it may safely and securely house your 19x25 photo, artwork, needlepoint, sign, etc. This pack includes 1 Single Matboard. Proudly made in the USA by Country Art House!