Our acid-free Fresh Linen Canvas matboards are 4-ply and feature a white core. With an overall size of 24x24, these mats with Square openings fit perfectly into 24x24 frames and are bevel cut to showcase your 8x8 photos. Actual mat opening size is 7.5x7.5 inches so that it may safely and securely house your 8x8 photo, artwork, needlepoint, sign, etc. This pack includes 1 Single Matboard. Proudly made in the USA by Country Art House!