Fits in most 3-Ring 12"x12" albums. Pack of 12 mixed photo pocket pages (2 of 5"x7" horizontal, 2 of 5"x7" vertical, 2 of 8"x10" horizontal, 2 of 8"x10" vertical, 2 of 8.5"x11" vertical, and 2 of 8.5"x11" horizontal page protectors). Acid free and archiva • Acid fr