These Prostand textbook covers are designed specifically for 4th grade students using Russian language books. Made from transparent PVC, they protect your school materials from dirt, moisture, and general wear while keeping the original book covers visible. The set includes eight covers in two different sizes to accommodate various book dimensions: four pieces measuring 262x425 mm and four pieces at 245x357 mm. This variety ensures that both larger and smaller textbooks are securely wrapped, making them a practical choice for students who want to keep their books in good condition throughout the school year.