Features: 1. Bubble Mailers: Usable Size: 13*15/13*18cm(optional) Pack of 50.Our lightweight shipping bags will reduce your shipping costs. 2. Self Sealed Envelopes:Tear resistant envelopes with super strong viscosity can be end-to-end bonding without the need for tape reinforcement.Once the envelope has been sealed it can not be opened without visible signs of tampering improving the safety of product packaging. 3. Multipurpose Bubble Mailers: Bubble Mailers is much stronger than paper envelope providing the best protection for irregular items during transportation. You can use our bubble mailers to mail cosmetics paintings fashion accessories jewelry etc. High quality Bubble Mailers keep them well during transportation. 4. The smooth surface of the mailers makes it easy to stick stamps and address labels. 5. Cost-effective Bubble Mailers: These padded envelopes are lightweight and water-resistant. Lower the shipping cost of your business and protect your products on rainy or snowy day. Notice: 1. Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. Specification: Material: PE Size: 13*15/13*18cm includes: 50 x Bubble Mailers "