How much does it cost to send a birthday card from UK Switzerland?

As of the date of my knowledge cutoff in August 2022, the Royal Mail offers the following rates for letter services to Switzerland:

- Standard letter (Up to 100g): £2.05

- Tracked letter (Up to 100g): £5.65

These prices are subject to change, and it's always a good idea to check the latest Royal Mail tariffs for the most up-to-date information.