If you’re shopping for new bedding, you might be wondering what size is a king pillowcase. Getting the right fit is essential for a neat look and a good night’s sleep. This guide will give you the exact dimensions you need.
We’ll also cover how to measure your pillows, the different types of pillowcases, and tips for choosing the best fabric. You’ll have all the information to make a perfect purchase.
What Size Is A King Pillowcase
A standard king-size pillowcase measures 20 inches by 36 inches (51 cm by 91 cm). This size is designed to fit a king-size pillow insert, which is typically 20 inches by 36 inches. It’s important to note that this is the standard for the United States and Canada.
In other parts of the world, sizes can vary. For example, a UK king pillow is often larger. Always check the specific measurements of your pillow before buying a case.
Standard King vs. California King
It’s easy to mix up standard king and California king bedding. They are different sizes. A standard king mattress is 76 inches wide and 80 inches long.
A California king mattress is narrower but longer: 72 inches wide and 84 inches long. However, the pillows are usually the same. Both bed types typically use the same standard king-size pillows and pillowcases.
So, if you have a California king bed, you’ll likely still need standard king pillowcases. Always double-check your mattress set’s details to be sure.
How to Measure Your Pillow for a Perfect Fit
Don’t just assume your pillow is a standard king. It’s best to measure it yourself. Here’s how to do it:
- Lay your pillow flat on a surface.
- Use a fabric measuring tape for accuracy.
- Measure the width from one seam to the other (the shorter side).
- Measure the length from seam to seam (the longer side).
- Note the thickness or loft of the pillow as well.
If your pillow is 20×36 inches, a standard king case is right. If it’s larger or has extra loft, you may need an “extra deep” or “queen” size case, which we’ll discuss later.
Types of King Pillowcase Closures
Pillowcases close in different ways. The closure affects the look and how the pillow stays inside. Here are the most common types.
Traditional Flap Closure (Housewife Style)
This is the classic style with an extra flap of fabric on the inside. You tuck the pillow into this flap. It gives a very neat, finished appearance and holds the pillow securely. Many people prefer this style for its clean look.
Open End with Hem
This is a simple envelope opening with a sewn hem. It’s easy to insert and remove pillows. However, the pillow can sometimes peek out or shift around more during the night. It’s a common and cost-effective style.
Zipper Closure
These cases have a zipper along one or two sides. They offer the most secure closure, great for people who move a lot in their sleep. They are also popular for decorative pillows that you don’t want to remove often. The zipper should be covered to protect your sheets.
Button or Tie Closure
Less common, but found on some luxury or vintage-style cases. Buttons or fabric ties add a decorative touch and provide a reasonably secure closure. They require a bit more effort to open and close.
Fabric and Material Guide for King Pillowcases
The fabric of your pillowcase affects comfort, durability, and care. Here’s a breakdown of popular choices.
Cotton (Percale, Sateen, Flannel)
Cotton is the most popular choice. It’s breathable, durable, and easy to care for. Percale cotton has a crisp, cool feel. Sateen cotton is softer and has a subtle sheen. Flannel cotton is brushed for warmth, ideal for colder climates.
Linen
Linen is made from flax fibers. It’s highly breathable, gets softer with every wash, and has a beautiful, relaxed texture. It’s excellent for temperature regulation but tends to wrinkle easily, which is part of its charm.
Silk and Satin
Silk (natural) and satin (a weave, often of polyester) are known for being smooth. They can help reduce friction on hair and skin, potentially minimizing frizz and sleep wrinkles. Silk is a natural temperature regulator but requires delicate care. Satin is more affordable and easier to wash.
Bamboo and Tencel (Lyocell)
These are modern, eco-friendly options. They are incredibly soft, moisture-wicking, and naturally resistant to dust mites and bacteria. They often feel silky-smooth and are great for sensitive skin or hot sleepers.
Polyester Blends
These are budget-friendly and wrinkle-resistant. They are durable and dry quickly. However, they are less breathable than natural fibers and may not feel as comfortable in warm weather.
Step-by-Step: How to Choose the Right King Pillowcase
Follow these steps to find the perfect king pillowcase for your needs.
- Measure Your Pillow: Confirm it’s 20×36 inches or note its exact dimensions.
- Consider Loft: For thick pillows (like some down alternatives), look for “extra deep” cases, often 21×37 inches or larger.
- Decide on a Closure: Choose between flap, open, zipper, or button based on your preference for security and style.
- Select Your Fabric: Think about your climate, skin and hair concerns, and desired feel (crisp vs. soft).
- Check Thread Count Wisely: A thread count between 200-600 is usually good. Extremely high counts (like 1000) can be misleading and less breathable.
- Match Your Bedding Set: Decide if you’re buying a set or separate cases. Buying separate allows for more mix-and-match creativity.
- Read Care Labels: Make sure you’re willing to follow the washing instructions (e.g., dry clean only, wash in cold water).
Common King Pillowcase Sizing Mistakes to Avoid
Avoid these pitfalls when shopping.
- Assuming All “King” is the Same: European or Australian king sizes differ. Always look at the inch/cm measurements.
- Ignoring Pillow Loft: A plush, high-loft pillow needs a deeper case. A standard case will be tight and may seam.
- Mixing Up Bed and Pillow Sizes: Remember, California King beds usually still use Standard King pillows.
- Forgetting About Shrinkage: Natural fabrics like cotton can shrink 3-5%. Pre-washed or “sanforized” fabrics shrink less.
- Not Buying Extras: It’s smart to have at least two sets of pillowcases per pillow for easy rotation while washing.
Care and Maintenance for Your King Pillowcases
Proper care extends the life of your pillowcases and keeps them looking fresh.
Washing Instructions
Always check the label first. As a general rule:
Wash in cold or warm water on a gentle cycle. Use a mild detergent. Avoid bleach on colored or delicate fabrics. Wash with similar colors.
Drying Instructions
Tumble dry on low heat. Remove promptly to minimize wrinkles. For linen or cotton, you can hang them to dry for a crisp feel. High heat can damage fibers and cause excessive shrinkage.
Ironing and Steaming
If you prefer a crisp look, iron while the fabric is slightly damp. Use the appropriate heat setting for the fabric. A garment steamer is a quick and easy alternative to remove wrinkles without direct heat contact.
Storage Tips
Store clean, completely dry pillowcases in a cool, dry place. Avoid plastic bags; use a breathable cotton storage bag or a shelf. Don’t store them with mothballs or strong scents that can transfer to the fabric.
FAQ Section
What are the dimensions of a king pillowcase?
A standard king pillowcase is 20 inches wide and 36 inches long (51 x 91 cm).
Is a king pillowcase the same as a California king?
Yes, typically. Both standard king and California king beds use the same standard king-size pillows and pillowcases (20×36 inches).
How big is a king size pillowcase in centimeters?
It is approximately 51 centimeters by 91 centimeters.
What if my king pillow is too thick for a standard case?
Look for “king extra deep” or “king size pillowcase for high loft” pillowcases. These are often 21×37 inches or larger to accommodate thicker pillows.
Can I use queen pillowcases on a king pillow?
No, queen pillowcases (20×30 inches) are too short for a king pillow (20×36 inches). They will not fit properly and will be very tight.
How many king pillowcases come in a set?
A standard sheet set for a king bed usually includes two king pillowcases. Always check the product description to confirm.
What is the best fabric for a king pillowcase?
The “best” depends on your needs. Cotton is a great all-around choice. Linen is best for breathability, silk/satin for reducing friction, and bamboo for softness and cooling.
Do king pillowcases shrink?
Yes, natural fiber pillowcases like cotton and linen can shrink, especially on the first wash. Washing in cold water and drying on low heat can minimize shrinkage.
Where to Buy King Pillowcases
You can find king pillowcases in many places. Department stores, home goods stores, and bedding specialty shops carry them. Online retailers offer the widest selection, making it easy to compare materials, prices, and reviews.
When buying online, always read the product description carefully. Check the exact dimensions, fabric content, and care instructions. Customer reviews can provide real-world insight into fit and quality, which is especially helpful.
Final Tips Before You Buy
Now you know exactly what size is a king pillowcase and what else to consider. Remember to measure your pillow first—it’s the most important step. Think about how the fabric will feel against your skin and how you want the bedroom to look.
Investing in good quality pillowcases can improve your sleep experience. They are changed frequently, so they should be comfortable and durable. With the right king pillowcases, your bed will look inviting and provide the comfort you need every night.