Our acid-free Pistachio Green matboards are 4-ply and feature a white core. With an overall size of 12x12, these mats with Square openings fit perfectly into 12x12 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 Show Kit With Acid Free Backing & Clear Bag. Proudly made in the USA by Country Art House!