If you’re shopping for new bedding, you might be asking: what is the size of a king size pillowcase? It’s a common question, and getting the right fit is key for a neat, comfortable bed. A standard king size pillowcase is designed to fit a king size pillow, but dimensions can vary slightly depending on where you shop and the specific style you choose.
Using the wrong size case can lead to a messy look and an uncomfortable night. A case that’s too small will stretch and strain the fabric, while one that’s too large will look baggy and your pillow can slip out. This guide will give you all the details you need to get the perfect fit.
What Is The Size Of A King Size Pillowcase
So, let’s get to the exact numbers. A standard king size pillowcase in the United States typically measures 20 inches by 36 inches, or 51 cm by 91 cm. This is meant to fit a standard king pillow insert, which is also 20″ x 36″. The case is cut slightly larger to allow for the pillow’s loft and a neat closure.
It’s important to remember that “standard” can vary. Always check the product description before you buy. Some brands or luxury styles might have slight variations. For example, a “European King” or “Super King” size will be different, which we’ll cover later.
Why the Exact Fit Matters
A perfect-fitting pillowcase does more than just look good. It protects your pillow from dust, oils, and stains, extending its life. It also ensures the closure, whether it’s a flap or a zipper, works properly. A good fit keeps your pillow securely in place all night long.
An ill-fitting case can cause the fabric to wear out faster due to excess tension. It can also feel annoying against your skin if it’s constantly slipping or bunching up. Taking a moment to check sizes saves you hassle in the long run.
Comparing Pillowcase Sizes
To really understand king size, it helps to see it next to other common sizes. Here’s a quick comparison:
- Standard: 20″ x 26″ (51 x 66 cm). Fits one person on a twin or full bed.
- Queen: 20″ x 30″ (51 x 76 cm). Common for queen beds, often used in pairs.
- King: 20″ x 36″ (51 x 91 cm). The longer length is for a king or California king bed.
- Euro Square: 26″ x 26″ (66 x 66 cm). A large square used for decorative shams.
As you can see, the king size is distinguished by its length. It’s the same width as a standard or queen case, but it’s 6 to 10 inches longer. This extra length is nessecary to cover the larger pillows used on a wide king-size mattress.
What About Pillow Sham Sizes?
Don’t confuse pillowcases with shams. Shams are decorative covers with a flange (a fabric border) and often a back closure. They are usually sized to fit over a pillow and a pillowcase. A king sham will typically be larger, around 21″ x 37″ or more, to accomodate the pillow inside its case.
Specialty King Sizes and Variations
The world of bedding isn’t always uniform. You might encounter these variations on a king size pillowcase:
- California King Pillowcase: Surprisingly, a California king bed uses a standard king size pillow (20″ x 36″). The mattress is longer but narrower, so the pillows are the same.
- Oversized or “Super King”: Some brands offer pillowcases up to 21″ x 37″ for a plusher, fuller fit over thicker pillows.
- European King: In Europe, sizing is different. A European king pillowcase is often closer to 35″ x 35″ (90 x 90 cm), which is a large square.
- King Size with Zipper Closure: These might be true-to-size or a bit smaller to ensure a tight, secure fit with the zipper.
Always, always measure your pillow before buying cases, especially if it’s older, hypoallergenic, or has extra loft. A down pillow might need more room than a memory foam one.
How to Measure Your Pillow Correctly
To find the right pillowcase, you need to know your pillow’s exact dimensions. Don’t just guess! Here’s how to do it properly:
- Lay the pillow flat on a bed or table. Smooth out any big lumps.
- Use a soft measuring tape for accuracy. A metal carpenter’s tape can be less precise for fabric.
- Measure the width from one side seam to the other. This is usually the shorter dimension.
- Measure the length from end to end. This is the longer dimension for a king.
- Note the loft (thickness) by measuring from the front to the back at the plumpest part. A high-loft pillow may need a deeper case.
Write these numbers down and keep them in your phone for when you shop. Compare them to the finished dimensions listed for the pillowcase, not the pillow insert size the brand suggests.
Choosing Fabric and Weave
The material of your pillowcase affects the feel and how the size fits. Some fabrics have more stretch than others.
- Cotton Percale: A crisp, flat weave. It has minimal stretch, so a precise fit is important.
- Cotton Sateen: A smoother, silkier weave that can have a slight give.
- Linen: Naturally relaxed and gets softer with washing. It drapes beautifully and can accomodate slight size variations.
- Bamboo or Tencel™: Often very soft and drapey with some stretch, offering a forgiving fit.
- Flannel: Thicker and may have a tighter fit initially, but will loosen slightly with use and washing.
If your pillow is at the upper limit of the size range, a fabric with some stretch (like a knit or sateen) might be more comfortable than a stiff percale.
Step-by-Step: Putting on a King Size Pillowcase
It sounds simple, but there’s a trick to getting a king pillow into its case neatly, especially with high-thread-count sheets.
- Turn the pillowcase inside out and lay it flat.
- Place your hands inside the case and grab the two far corners.
- Now, grab the pillow by its corners through the case fabric.
- Shake and flip the case over the pillow, using the fabric you’re holding as a guide.
- Adjust the pillow into all four corners of the case and smooth it out.
This “burrito method” prevents fighting with the fabric and keeps the pillow from getting bunched up at one end. It makes the task much quicker and easier.
Caring for Your King Size Pillowcases
Proper care maintains the size, color, and feel of your pillowcases. Follow these tips:
- Wash before first use to soften the fabric and remove any manufacturing residues.
- Wash in cool or warm water with similar colors. Hot water can cause shrinkage, especially in cotton.
- Tumble dry on low and remove promptly to minimize wrinkles. High heat is a common cause of shrinkage.
- Iron on a medium setting if desired, while the fabric is still slightly damp for best results.
- Rotate your cases with each wash to ensure even wear and tear over time.
If a case does shrink a bit, try stretching it gently while damp and air-drying it flat. This can sometimes help recover some of the lost size.
Common Problems and Solutions
Even with the right size, you might encounter a few issues. Here’s how to fix them.
Pillowcase is Too Tight
If the case is straining at the seams, your pillow might be too thick or the case might have shrunk. Check the care label and avoid high-heat drying next time. You may need to look for “oversized” cases or ones specifically for high-loft pillows.
Pillowcase is Too Loose and Baggy
A baggy case looks untidy. First, ensure you haven’t accidentally bought a “queen” size. If the size is correct, your pillow may have compressed over time. Consider replacing an old pillow or using a pillow protector underneath to add bulk.
Pillow Won’t Stay Inside the Case
This happens with cases that are too big or with slippery fabrics. Look for cases with a deeper envelope closure or an inner flap to hold the pillow in. Some people even safety-pin the inner flap to the pillow for extra security.
Where to Buy and What to Look For
You can find king size pillowcases at department stores, home goods stores, and online retailers. When shopping, pay close attention to:
- Listed Dimensions: The product specs should state the finished size in inches or centimeters.
- Customer Reviews: Read reviews to see if people mention the fit being true to size, large, or small.
- Return Policy: Choose a retailer with a good return policy in case the fit isn’t right when you get it home.
- Material Content: Know what fabric you’re buying and it’s care instructions to anticipate how it will behave.
Investing in a few high-quality king pillowcases is worth it. You’ll use them every single night, so comfort and durability are key.
FAQs About King Size Pillowcases
Is a king size pillowcase the same as a California king?
Yes, typically it is. Both standard king and California king beds use the same 20″ x 36″ pillow size, so the pillowcases are interchangable. The difference is in the mattress dimensions, not the pillows.
How many king size pillowcases come in a sheet set?
It depends on the set. A standard king sheet set usually includes two king pillowcases. A “bed-in-a-bag” or bundle might include more, sometimes up to four, especially if it includes decorative shams.
Can I use queen pillowcases on a king pillow?
You can try, but it will be very tight and likely won’t close properly. A queen case is 6 inches shorter than a king pillow, so it will stretch and strain the seams. It’s not recommended for regular use as it can damage the fabric.
What if my pillow is non-standard size?
For custom, odd-shaped, or body pillows, you may need to look for specialty retailers or consider having pillowcases custom made. Many online shops offer this service where you can provide your exact measurements.
Do pillowcase sizes vary by country?
Absolutely. Sizes in the UK, Australia, and Europe are different. For example, a UK king pillow is often 50 cm x 75 cm (20″ x 30″), which is closer to a US queen size. Always check the country of origin and its specific sizing chart.
How much bigger should a pillowcase be than the pillow?
A good rule of thumb is that the pillowcase should be about 1-2 inches longer and wider than the pillow insert. This allows for the pillow’s fullness and makes it easier to put on and take off. Any more than that and it may look sloppy.
Final Thoughts on Finding the Right Fit
Knowing the answer to “what is the size of a king size pillowcase” is the first step to a beautifully made bed. Remember the standard is 20 by 36 inches, but always verify with your own pillow and the product details. Taking those few extra minutes to measure and read reviews will ensure you get a pillowcase that fits perfectly, looks great, and helps you get a good night’s sleep.
Your bedding is a personal choice, and comfort starts with the basics. A well-fitting pillowcase is a simple but important part of that. Now you have the knowledge to choose wisely and avoid the frustration of a poor fit.