Oh how I would love the US prices for postage…. However, Royal Mail has other ideas.
2nd class domestic is 75p, supposed to arrive within 3 working days (shoved into a search engine, says this is 0.94 USD)
1st class domestic is £1.25, supposed to arrive next working day (1.57 USD)
first band for airmail/international standard is £2.20 (2.77 USD)
first band for international economy (surface mail) for outside of Europe is £2.00 (2.52 USD)