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Looking for boxes that make the most of the Royal Mail medium parcel size bracket? Our range is designed to maximise what you can ship while keeping postage costs under control. Whether you're sending bulkier e-commerce orders or heavier items, staying within the medium parcel size limit helps avoid unnecessary charges.
Choose from double-walled boxes for strength and protection, or single-walled boxes for lighter, cost-efficient packaging — all selected to fit within Royal Mail’s maximum dimensions of 61 x 46 x 46cm and weight up to 20kg.
Optimising for this tariff can save you significantly, especially when sending at scale. Avoid reclassification fees and keep fulfilment predictable by using the right box for the job.
For full size and weight limits, visit Royal Mail’s guide.