Switory 25pc Small A4 21.6cmx28cm Kraft Bubble Mailers Padded Envelopes for Packaging Gold Delivery Envelopes PaddedEco Friendly Materials Bubble MailerThe envelope is made of kraft. Your customers will be surprised and relieved to open a bubble mailer of eco friendly materials. Using biodegradable shipping supplies will speak volumes about your sense of social responsibility and the high grade of your brand, and bring you closer to your customers through a good corporate image. Usable size 21. 6cmx28cm, outside size: 21. 6cmx32cm. Pack of 25pcs. Whether you are