Measuring the vertical distance from the top of the box spring to the floor is key to helping you select the right bed-skirt drop length. For example, a box spring positioned on a low-profile frame and the same box spring placed atop a higher frame have different drop measurements. When the actual skirt dimensions are approximately 1 to 2 inches shorter than the drop measurement, the skirt hem clears the floor and provides enough coverage to give your bed a neater finish for classic decor.
1 Measure the vertical distance between the top of the box spring to the floor to determine the drop length. To be safe, measure this drop around different sides of the box spring in case the box spring is not level with the floor.
2 Record this drop length in inches. If the drop length is different around sides of the box spring, record the average length. Round up to the nearest inch.
3 Subtract 1 to 2 inches from this recorded drop length to calculate the actual bed-skirt drop length. A bed skirt with a drop length of approximately 14 inches skims the floor surface and provides enough cover to hide items stored under the bed.