Holidays and Traditions How big is a king size bed in feet and inches? How big is a king size bed in feet and inches? King size bed dimensions: 76 inches by 80 inches (193 centimeters by 203.5 centimeters). For room planning, a king size bed dimensions in feet are 4.42' by 6.67'.28 Oct 2019 How big is a king size bed dimensions? 76” x 80” How big is a king size bed UK inches? Related Posts:There is a guide to standard sofa sizes and dimensions.Does a California king need special sheets?What is bigger than a California king bed?Is a California king two queens?