Leather Photo album, paper insert allbum MATERIAL: leather cover+ paper+ pp sheets COVER thinckness:2.5MM INNER sleeves:4R 100photos;1UP,one photo oneach side 4R 200photos; 2UP;two photos on each side 4R300 photos; 3UP;three photos on each side we also can make size of 3R,5R,6R photos sleeves thickness is from 0.02MM to 0.07MM OEM is welcome