I have had hotel rooms where I had to get up and move from my chair to let Kelley pass by me to walk around the bed. The average hotel room size in the US is about 325 square feet according to Bjorn Hanson in a Kitty Bean Yancey article three years ago in USAToday. Bjorn Hanson (bio link) is one of the most frequently cited experts I see on hotel industry statistics and trends.