When it comes to choosing a rug size, there are a few things you need to take into account. The first is the size of your bed. A queen size bed is 60 wide and 80 long, so you'll need a rug that is at least 8' wide and 10' long. This will allow you to have 18-24 inches of flooring around the perimeter of your bed.
The second thing to consider is the furniture in your room. If you have a nightstand or dresser next to your bed, you'll want to make sure they fit on the rug as well. You don't want your furniture floating in the middle of an ocean of rug! A good rule of thumb is to leave about 12-18 inches of space between pieces of furniture.
Finally, think about how much traffic flow you have in your bedroom. If it's a high traffic area, you'll want to choose a durable rug that can handle some foot traffic. If it's a low traffic area, then you have more options when it comes to materials and styles