How to Measure for a King Bed Skirt? | Get the Right Fit

To measure for a king bed skirt, match the bed’s width and length, then measure the drop from the box spring top to the floor.

Getting the right fit for a king bed skirt comes down to three numbers: width, length, and drop. Most standard U.S. king mattresses and box springs measure 76 x 80 inches, but bed skirts are often cut wider at 78 x 80 inches so they wrap around the base properly. The drop—how far the skirt hangs—commonly falls around 15 or 18 inches, depending on the brand and your bed’s height.

Grab a tape measure and follow the steps below. With three quick measurements, you can order with confidence and skip the return hassle.

The Three Measurements You Need

You only need a tape measure and about five minutes. Measure each dimension separately, and write the numbers down as you go.

• Width: Measure across the box spring from the left edge to the right edge, at the widest point.
• Length: Measure from the head of the bed to the foot of the bed, again at the longest point.
• Drop: Measure straight down from the top of the box spring or bed base to the floor.

If your bed sits on a platform base without a box spring, measure from the top edge of the platform where the skirt will rest. That surface is your starting point for the drop, not the mattress top. Eastern Accents’ bedding measurement guide uses this same approach, starting at the box spring or foundation rather than the mattress.

What Size Is a King Bed Skirt?

Standard king bed skirts are typically sized at 78 x 80 inches, slightly wider than the 76 x 80-inch mattress and box spring dimensions. That extra width lets the skirt tuck between the mattress and box spring while still hanging straight on all sides. The drop is where sizing varies most between brands.

A 15-inch drop suits most standard box springs and frames, while an 18-inch drop works better for thicker bases or taller platform beds. Thomasville at Home’s measuring guide notes that the top of the bed rail, not the mattress surface, is often the correct starting point for measuring height—so check your frame’s rail height before choosing.

Always confirm the drop measurement against the product’s size chart before ordering. Many brands list both the flat dimensions and the drop, and the combination determines the final look.

Common Sizing Mistakes to Avoid

The biggest error is assuming every king bed skirt fits every king bed. Sizing varies by brand, style, and even cut. Tailored and pleated skirts need a more exact drop and corner measurements than gathered styles, which are more forgiving.

• Don’t measure the mattress top. The drop starts at the box spring or bed rail, not the surface you sleep on.
• Don’t confuse king with California king. A California king measures about 72 x 84 inches and needs a different skirt entirely.
• Don’t skip the frame check. Beds vary by construction; if your frame sits higher than the box spring, measure from the frame’s top edge.

If you’re shopping for a new skirt, check the product details carefully. The right measurements make installation simple—and the wrong ones make returns inevitable.

Ready to shop? Browse top-rated king bed skirts to see options that match your measurements.

Quick Reference for Standard King Sizes

Use this quick comparison when matching your measurements to a product’s size chart.

Keep this simple rule in mind: match the flat dimensions loosely, nail the drop exactly, and check the brand’s chart before you click buy. WikiHow’s guide on measuring bed skirt drop length reinforces the same point—the drop measurement is the one that determines whether the skirt touches the floor, floats too high, or puddles underneath.