25 Pack Rigid Mailers, 9.5x12.5 inches Self Seal Photo Document Mailers Premium Cardboard Keep Flat Envelopes for Photos Pictures Papers Files CD

The Xxcxpark 25 Pack Rigid Mailers are self-seal photo document mailers made from premium cardboard that keep flat envelopes for photos, pictures, papers, files, and CDs. These envelopes can be shipped as flat 6.25 x 8.25 inches letter or flat packages with any shipping company and USPS, and they are shipped as "Flat Rate Envelopes" by USPS. Based on the Q&A section, the envelope is 10 inches wide, which is 25.4 cm (measured after the envelope is sealed and closed, excluding the size of the top lid). These mailers are not waterproof, and it was mentioned by a customer that the seal comes undone, and it is essential to reinforce it with packaging tape to stay closed. The reviewers' experiences of the Xxcxpark 25 Pack Rigid Mailers seem to be mixed. Some customers found that the envelope is very stable, which makes it ideal for sending important documents and pictures, and works great to ship books. The material is stable and suitable for flat items. However, other customers mentioned that the envelopes are slightly thicker than basic cardstock, which is not at all suitable for mailing 8x10 photographs through the postal service and expecting them to not be bent or creased. They emphasized that the envelopes are not rigid and won't be ordering again. Additionally, a few customers noted that the adhesive isn't strong enough to stay closed without taping.