Hotel Room Sizes

I went into a discussion in class about the difference between a "double room" and a "twin room". To me, a twin room sounds unfamiliar to me since I seldom used this term while I booked a hotel room in the US. So I checked it up on the Internet and found some useful information for you to read.

Single: A room assigned to one person. May have one or more beds.
Double: A room assigned to two people. May have one or more beds.
Twin: A room with two twin beds. May be occupied by one or more people.

Reference: http://www.setupmyhotel.com/train-my-hotel-staff/front-office-training/how-to-define-room-types-in-hotels.html

So, it doesn't matter how many beds there are in either a single or double room, whereas there must be two "twin"-size beds in a twin room. A twin size bed usually has the measurement of 39" x 75", or 3 1/4" x 6 1/2".

Click the following links to see more pics, and you will see that a double room can denote a big bed for two people or two separate beds. It is designed for two people anyhow.

Double Room:
https://www.google.com/search?hl=zh-TW&q=double%20room&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi&ei=kwTtUOKKB5HPkgW0zIDQCg&biw=1280&bih=685&sei=lQTtUIK6He6KmwX8lICwBQ

Twin Room
https://www.google.com/search?um=1&hl=zh-TW&tbo=d&biw=1280&bih=685&tbm=isch&sa=1&q=twin+room&oq=twin+room&gs_l=img.3..0j0i24l9.1119015.1119441.0.1119779.4.4.0.0.0.0.86.256.4.4.0...0.0...1c.1.A_fJ3Z4FG_M