The Prostand book cover set is designed specifically to protect Russian school textbooks for 7th grade students. Made from transparent polyethylene, these covers keep your books safe from dirt, moisture, and general wear throughout the school year, allowing the original cover art to remain visible. This pack includes 10 covers in two different sizes to accommodate various book dimensions. You will find five pieces measuring 246x425 mm and another five measuring 245x357 mm, ensuring a proper fit for the standard curriculum materials used by students.