25 - 12" X 24" Brodart Book Jacket Covers -- Center-Loading, Adjustable, Clear Mylar ***These high quality book jacket covers are Center-Loading for Dust Jackets up to 12" tall. ***The covers are 1.5 mil in thickness. ***Lo-Luster covers cut down on glare from overhead lights and hide jacket imperfections. ***Closed edges are permanently bonded. Paper backing for added protection.