Royal Mail will retained a 60p 1st class and 50p 2nd class rate for letters in the rate changes which take effect on April 2. Large Letters also remain the same. 

International postcards rise by 1p to 88p, while Worldwide to 40g actually drops 2p to £1.88.

Parcels will now be subdivided into Small Parcels (45cm x 35cm x 8cm), up to 2kg, and Medium Parcels (61cm x 46cm x 4cm), up to 20kg. 

Small Parcels cost £2.60 2nd class and £3.00 1st class at the first weight step (up to 1kg), while Medium Parcels cost £5.20 or £5.95 at the same weight step.

Royal Mail's full prices brochure can be downloaded here.