On One Hand: Tuck a King-Size Skirt to FitA king bedskirt can be adjusted to fit a queen-size mattress with a little creativity. While a king-size bed measures 78 by 80 inches, a queen-size mattress measures 60 by 80 inches. The bedskirt will need to be tucked in between the mattress and box spring to eliminate excess width. Gather the excess skirt and pin it to the box spring.On the Other: Some Skirts May Not Look GoodWhile most bedskirts can be adjusted to fit a queen-size box spring and mattress, some skirts won’t look as good gathered in areas to fit snugly. If the king bedskirt is a solid color with a tight fit around the box spring, the pleats you’ll need to add to shorten the width may not be aesthetically appealing.Bottom LineA king-size bed skirt can easily be adjusted to fit a queen-size mattress.