The opening size is 15.5"x19.5" for 16x20 print + backing board
Our acid-free blackcore matboards are a 4-ply papermat that provide
the aesthetic and design benefits of a bright white bevel., Each sheet
of mat board has a richly colored front surface, a blackcore and a
white backing. It can be used for matting photos, art, and needlepoint.
Also great for crafts, backboards, signs, children's projects, and
Other color is also available upon request.
Quantity 1 = 10 mats and 10 backing.
(Free Shipping available for continental US only. For PR, Alaska, Hawaii, APO and FPO please email us first)