Our acid-free Royal Blue Suede matboards are 4-ply and feature a white core. With an overall size of 28x40, these mats with Oval openings fit perfectly into 28x40 frames and are bevel cut to showcase your 24x36 photos. Actual mat opening size is 23.5x35.5 inches so that it may safely and securely house your 24x36 photo, artwork, needlepoint, sign, etc. This pack includes 1 Single Matboard. Proudly made in the USA by Country Art House!