**Product Specifications:**

**Brand:** deli

**Model:** 70593

**Material:** CPP

**Product Name:** Corner Cut Book Cover Set

**Contents:** A4x3, 16kx14, 25kx2, 18kx1 (sheets)

**Product Size:**

- A4 (3 sheets): 470x336 mm (cover), 210x296 mm (book)

- 16K (14 sheets): 450x300 mm (cover), 185x260 mm (book)

- 18K (1 sheet): 380x280 mm (cover), 169x240 mm (book)

- 25K (2 sheets): 340x250 mm (cover), 148x210 mm (book)

**Usage Tips:** Please measure the size of your book cover before purchasing to avoid misfits.

**Book Size Measurement Guide:**

- Grade 5: Book Width Size Reference Table

**Adaptability:** Suitable for various book sizes in different regions and grades.

**Book Cover Size:**

- Primary School (Language, Mathematics, English): 16K (185×260 mm, 430×300 mm)

- Junior High School (Mathematics, English): A4 (210×296 mm, 470×336 mm)

- Shanghai (Language): 16K (185×260 mm, 430×300 mm)

- Medium (Mathematics, English, Physics, Chemistry): A4 (210×296 mm, 470×336 mm)

- Zhejiang (Primary School Mental Arithmetic Training): 18K (169×240 mm, 340×250 mm)

- And more specifications for different subjects and grades.

**Safety Standards:** Complies with the chemical safety standards of the Chinese educational supplies industry and GB21027 "General Requirements for Safety of Student Articles".

**Features:** Transparent protective film, matte texture, clear visibility, easy to handle, approved for educational use.

**Cleaning:** Water and stain-resistant, easy to clean, protects books from water damage.

**Environmental Protection:** Made of CPP transparent matte material, high clarity, water and stain-resistant, durable, with a paper protection layer.

(Note: The translation may have minor variations due to the complexity and length of the input text.)