Royal Mail parcel sizes and prices 2026
Choose where and when you buy postage, then enter packaged weight and format. Online and counter prices differ. The calculator and tables update together.
UK postage cost calculator
Max 45 × 35 × 16 cm. Large letter: 750g standard/Signed For, 1kg Tracked.
Postage price — online
£4.40
2–3 working day aim, including Saturday; delivery is not guaranteed.
Compensation up to £20, subject to service terms and item eligibility.
UK consumer postage only. Excludes Special Delivery, international services, business discounts and collection charges. Select the date period when you buy postage. Published tariffs checked 2 October 2026; confirm the final price with Royal Mail.
Official price guide for this selection. Without the size check, you must confirm the package fits the selected format. Tubes use separate rules shown below.
Unsure which format fits? Check your parcel dimensions and download a packing worksheet before buying postage.
Royal Mail prices by size and weight
Online purchase · From 5 October 2026. Change the purchase channel or period in the calculator to update this table. Base prices without signature.
| Format | Up to | 1st | 2nd | Tracked 24 | Tracked 48 |
|---|---|---|---|---|---|
| Letter | 100g | £1.80 | £0.91 | — | — |
| Large letter | 100g | £3.20 | £1.55 | — | — |
| Large letter | 250g | £3.30 | £1.90 | — | — |
| Large letter | 500g | £3.30 | £2.40 | — | — |
| Large letter | 750g | £3.30 | £2.70 | — | — |
| Large letter | 1kg | — | — | £3.90 | £2.90 |
| Small parcel | 2kg | £5.70 | £4.40 | £4.80 | £3.75 |
| Medium parcel | 2kg | £8.20 | £7.00 | £6.75 | £5.70 |
| Medium parcel | 10kg | £10.40 | £9.00 | £8.80 | £7.55 |
| Medium parcel | 20kg | £16.40 | £13.70 | £14.30 | £12.25 |
Tracked large letter has one band up to 1kg. Signature adds £2.00 to letters/large letters or £1.60 to parcels. Inclusive limits: a package at the listed weight remains in that band.
Royal Mail parcel sizes and delivery aims
Letter
Maximum 24 × 16.5 × 0.5 cm
Up to 100g
Large letter
Maximum 35.3 × 25 × 2.5 cm
Up to 750g (1kg for UK Tracked)
Small parcel
Maximum 45 × 35 × 16 cm
Up to 2kg
Medium parcel
Maximum 61 × 46 × 46 cm
Up to 20kg
For tubes and rolls, length plus twice the diameter must be no more than 104cm, and the greatest dimension no more than 90cm. Confirm the applicable parcel format with Royal Mail.
1st Class aims for the next working day; 2nd Class for 2–3 working days, including Saturdays. Tracked 24 and 48 offer tracking with next-day and 2–3-day aims. These are delivery aims, not guarantees. Signed For gives confirmation/signature on delivery rather than full journey tracking.
Royal Mail 2026 price changes and size guides · checked 2 October 2026.
Post Office vs Royal Mail online prices
Buying at a Post Office counter and buying Royal Mail postage online use different consumer tariffs. Dropping off prepaid online postage is different from buying postage at the counter.
2nd Class small parcel up to 2kg online: £4.40
Same service at the counter: £4.60
This is a Royal Mail channel comparison. For another carrier, obtain a current quote for the same dimensions, weight, drop-off/collection choice and cover. This page does not claim the cheapest price across all carriers.
Before buying postage
- Weigh and measure the item with its packaging. Both size and weight determine the format.
- Choose the price period and purchase channel. Parcel and Tracked prices change on 5 October 2026; standard letter and large-letter prices remain unchanged.
- Match the service to the delivery aim, tracking and compensation you need. Standard and Signed For cover is up to £20; Tracked up to £75, subject to terms. For guarantees or greater cover, check Special Delivery separately.
- Check restricted/prohibited items and the carrier's compensation exclusions before paying.
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