The opening size is 7.5"x7.5" for 8x7 print with a bevel cut.

The backing is also 4-ply.

 Our acid-free white core mat boards are a 4-ply paper mat that provide the aesthetic and design benefits of a bright white bevel., Each sheet of mat board has a richly colored front surface, a white core and a white backing. It can be used for matting photos, art, and needlepoint. Also great for crafts, backboards, signs, children's projects, and school projects.

For color choices, please email us the color number and quantity or include it in the comment box during checkout. Click here to see how to put your color choice into the comment box.