The main difference between king size beds and queen size beds is the width, as both ty types share the same length. A queen size bed is typically 60 inches wide and 80 inches long, whereas a king size bed is 76 inches wide and 80 inches long. A king-size bed suits well in master bedrooms, ideal for couples who enjoy more personal space while sleeping or are parents looking forward to co-sleeping with their baby comfortably. Whereas a queen-size bed is more space-efficient and compact, ideal for couples who enjoy ample personal space for comfortably sleeping.