Our acid-free Teal Blue matboards are 4-ply and feature a white core. With an overall size of 11x11, these mats with Circle openings fit perfectly into 11x11 frames and are bevel cut to showcase your 7x7 photos. Actual mat opening size is 6.5x6.5 inches so that it may safely and securely house your 7x7 photo, artwork, needlepoint, sign, etc. This pack includes 1 Single Matboard. Proudly made in the USA by Country Art House!