Royal mail post sizes guide
Royal Mail provides a comprehensive guide to post sizes and dimensions for various mail items. Here's a summary of the most common post sizes and dimensions:
Letters
- Standard letter: Up to 240mm (9.5 inches) long, 165mm (6.5 inches) wide, and 5mm (0.2 inches) thick.
- Large letter: Up to 353mm (13.9 inches) long, 250mm (9.8 inches) wide, and 25mm (1 inch) thick.
Large Letters and Parcels
- Large letter: Up to 353mm (13.9 inches) long, 250mm (9.8 inches) wide, and 25mm (1 inch) thick.
- Small parcel: Up to 61cm (24 inches) long, 46cm (18 inches) wide, and 46cm (18 inches) tall.
- Medium parcel: Up to 61cm (24 inches) long, 46cm (18 inches) wide, and 61cm (24 inches) tall.
- Large parcel: Up to 76cm (30 inches) long, 51cm (20 inches) wide, and 76cm (30 inches) tall.
Special Services
- A4 envelope: Up to 210mm (8.3 inches) long, 297mm (11.7 inches) wide, and 5mm (0.2 inches) thick.
- A3 envelope: Up to 297mm (11.7 inches) long, 420mm (16.5 inches) wide, and 5mm (0.2 inches) thick.
- Large A3 envelope: Up to 420mm (16.5 inches) long, 594mm (23.4 inches) wide, and 5mm (0.2 inches) thick.
International Mail
- International large letter: Up to 353mm (13.9 inches) long, 250mm (9.8 inches) wide, and 25mm (1 inch) thick.
- International small parcel: Up to 61cm (24 inches) long, 46cm (18 inches) wide, and 46cm (18 inches) tall.
- International medium parcel: Up to 61cm (24 inches) long, 46cm (18 inches) wide, and 61cm (24 inches) tall.
- International large parcel: Up to 76cm (30 inches) long, 51cm (20 inches) wide, and 76cm (30 inches) tall.
Special Items
- Flat items (e.g., CDs, DVDs, and vinyl records): Up to 30cm (11.8 inches) long, 30cm (11.8 inches) wide, and 5mm (0.2 inches) thick.
- Rolls (e.g., maps, posters, and prints): Up to 76cm (30 inches) long, 30cm (11.8 inches) wide, and 5mm (0.2 inches) thick.
Please note that these dimensions are subject to change, and you should always check the Royal Mail website for the most up-to-date information. Additionally, some items may require special packaging or handling, so it's always a good idea to check with Royal Mail or a post office for specific guidance.