The ProMatte Double Whitecore 16 x 20" Mat for Print - White (5 Pk) by Savage is a 5-pack of pre-cut museum mats of 16 x 20" size to hold prints 11 x 14" in size. The mats are a polar white color. Each mat is cut from double-thick Spectrum Whitecore matboard and individually packaged in a clear-view poly bag, which eliminates warping inherent in shrink-wrap. Savage's ProMatte Museum series mats are acid and lignin free to protect your prints. The generous proportions and 8-ply matboard provide a sophisticated look found in art galleries and museums.