Mixed mailers: 100 bags in 1 bundle and 25 bags of each size. 4 SIZES 17 * 23cm / 23 * 30cm / 30 * 40cm / 35 * 45cm, the package size depends on what you're sending. These bags are extremely difficult to open, ensuring your items arrive safely without risk of tampering Packing materials: High-quality plastic bags made of polyethylene. Not only waterproof, thicker than market standards, wear-resistant, but also durable and long-lasting, no odor or smoke emission. Functions as a safety bag or shoulder bag for textiles, clothing (jeans, jerseys, shirts, t-shirts) Easy to handle: Self-adhesive plastic mailing bags with rub-off adhesive strips for effortless handling. Strong adhesion and easy-to-close design. Lightweight and cost-effective by reducing shipping expenses Multipurpose: Ideal for shipping, wrapping, mailing envelopes, and packaging clothes and gifts. Used mailing bags can serve as garbage bags to promote resource reuse. Note: Keep away from children—these are not toys