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Royal Mail parcel size

Format, size and weight only. No prices, and no Royal Mail endorsement. Updated 11 October 2026.

Limits from Royal Mail, checked 11 October 2026. Size and weight only, taken from Royal Mail’s UK sending page on 11 October 2026. This page does not show prices and is not a Royal Mail service. Large Letter weight on that page is 1kg for Tracked 24 and Tracked 48, and 750g for 1st Class, 2nd Class and Signed For.

Smallest listed format this fits: Small Parcel. The parcel formats listed on the Royal Mail UK sending page.

Source: Royal Mail, UK sending, checked 11 October 2026. Tubes also cite the UK Parcel services user guide (April 2026). Measure the complete outer packaging. For a price, use Royal Mail’s own price finder.

MakePost sends paid Shopify orders to the Click & Drop account you already have. See MakePost.