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- Envelopes adjustable in height to max of 50mm to suit the contents
- Self-sealing strips for quick and easy closures
- Quality brown finish for professional looking results
- Reinforced edge and corner protection for maximum postal protection
- Made from FCS certified materials
Each of these rigid cardboard envelopes is expandable up to a depth of 50mm, making them ideal for mailing photos, certificates, magazines, mail order catalogues documents, contracts and providing protection from tearing and creasing. All sizes are measured against Royal Mails price and size guidelines so that you can plan your postage costs in advance.