When it comes to choosing a rug size for a full-size bed, a good rule of thumb is to allow the rug to extend about 2 feet on all three sides of the bed. This means that a 6x9 rug is typically the best size for a full-size bed. However, if the room is on the smaller side, a 5x8 rug can work just fine. If you dont have the space for one of those sizes, you can also consider using two 2x3 rugs on either side of the bed or a runner at the foot of the bed. Its important to make sure that the rug is not too small or too big for the space, as a rug that is too small can look squished, while a rug that is too big can feel overwhelming.