OCB Virgin | King Size Slim | Unbleached | Box of 50 OCB: completely natural! OCB Unbleached Virgin Paper King Size Slim is an unbleached paper, which gives it its natural, light brown color. Like all ultra-thin OCB papers, each sheet is watermarked and gummed with natural gum arabic, which is known for its reliability. 32 papers per pack - 50 packs in 1 box. Length: 11 cm. Width: 4.4 cm