As a host and a traveller I agree that it is too hard to search to search for specific types of beds and too hard to understand what is offered by hosts.  Could there be a king, queen, full, twin search for airbnbs in the US and Canada then maybe something else (do it by measurements maybe for european countries)? I understand you can contact the host to ask but this is time consuming and then you get spammed sometimes.  My husband and I and most of our friends value having a king bed.  Practically all hotels in the US offer king rooms so this is not an uncommon preference.  It is very hard to tell what is offered (especially in Europe) when booking.