In many cases, hotels use their own terminology and room types, and therefore we refer you to the hotel page that is linked and associated with each specific hotel.
Standard room types are:
A one-person room. The size, placement and standard of the room might be a bit less than that in the double rooms. On some occasion, a single room might be a double room for single person use.
Double room/standard room
A room for two people. The room has two separate beds or one double bed. When the room has two separate beds, it is referred to as standard twin room.
A room for three people. The room has either three separate beds or one double bed and a single bed, grand lit and a single bed or two grand lit.
(A single bed is anything between 80-110 cm wide; Grand lit is a 111-140 cm wide bed; double bed queen size is a 141-189 cm wide bed)
A room for four people. The room has either four separate beds, two double beds, two bunk beds or one bunk bed combined with any other bed.
Family room/Family suite
Consists of one room with sleeping area, one bedroom with an alcove or one bedroom with a sleeping loft. It could also consist of two rooms.
If you book an apartment when going on vacation, it is usually an apartment situated in a larger complex like an apartment hotel. So this works just as in a regular hotel only that you have access to a full apartment with kitchenette. Often when you choose this alternative, it is a way to cut costs by cooking your own meals. On some occasions, cleaning is included.
Other room types
You can find terminologies such as superior, executive, premium, deluxe or the like. This might indicate that the room has a higher standard on interior decorating and/or equipment, a better location within the hotel, extra services, etc. Please consult the website of the specific hotel.