I stayed at hotels in different places, and each hotel provides different set of towels. But sometimes I don't know what is the purpose of each towel!
For example, attached two photos from a en-suite-bathroom in a businesses-European hotel, with 4 different towels.
I think that 1 is to use after shower (large towel) and 3 is used after washing hands. But what is 2 and 4 used for?!