If you’re shopping for new bedding, you might be asking, what is the size of a king size pillow case? It’s a common question, as getting the right fit is key for a neat look and a good night’s sleep. A standard king pillowcase is designed to fit a king-size pillow, but dimensions can vary slightly depending on the brand and the style you choose.
This guide will give you all the details you need. We’ll cover standard measurements, variations like European king, and how to measure your own pillows. You’ll also learn about different closure types and materials. Let’s make sure your pillows are dressed perfectly.
What Is The Size Of A King Size Pillow Case
The most common answer in the United States is 20 inches by 36 inches. This is the standard measurement for a king pillowcase designed to fit a standard king pillow insert, which is 20″ x 36″. The pillowcase is cut slightly larger to allow for the pillow’s loft and to create a snug fit.
It’s important to remember that this is the finished size. The actual fabric piece will be bigger to account for seams and the closure flap. Always check the product description before buying, as some “king” cases might be meant for European sizes or could be oversized.
Standard King vs. California King: A Crucial Difference
This is where many people get confused. A standard king bed (also called Eastern King) and a California King bed use different sized pillows.
- Standard King Pillow & Case: 20 inches wide x 36 inches long. This is the most common king size.
- California King Pillow & Case: 20 inches wide x 40 inches long. These are longer to match the longer, narrower California King mattress.
Mixing them up will leave you with a pillowcase that is either too short or oddly loose. Always verify which king bed you have before purchasing pillowcases.
European King Pillowcase Dimensions
If you’re looking at imported bedding or luxury brands, you might encounter European sizing. Their “king” is often different. A common European king pillowcase size is approximately 20 inches by 40 inches (50 x 80 cm), which is similar to a California King case. However, European sizes can vary by country, so checking the centimeter measurements is your best bet.
Why the Exact Fit Matters
Using the correctly sized pillowcase isn’t just about aesthetics. A case that’s too small will overstretch the fabric, causing wear and tear and making the closure strain. A case that’s too large will look sloppy and the pillow will shift around inside, which can be annoying while you sleep. The right fit keeps everything secure and looking tailored.
How to Measure Your Pillow for a Perfect Match
If your pillow isn’t labeled or you’re unsure, here’s a simple way to measure:
- Lay the pillow flat on a solid surface. Try to fluff it to it’s normal thickness.
- Measure the width from one seam to the other across the shortest side.
- Measure the length from seam to seam along the longest side.
- Note the dimensions as Width x Length (e.g., 20″ x 36″).
When shopping for a new case, look for one that is 1 to 2 inches larger than your pillow’s dimensions in both directions for a comfortable fit.
Types of King Pillowcase Closures
The closure is the part of the pillowcase that keeps your pillow inside. The type you choose affects the look, security, and feel.
Traditional Flap Closure (Housewife Style)
This is the classic design with an extra flap of fabric inside the opening. You tuck the pillow under this flap, which helps keep it securely in place. It gives a very finished, neat appearance when made well.
Oxford or Flanged Closure
An Oxford pillowcase has a decorative border, or flange, around all four edges. This border can be narrow or very wide (often called a “Euro flange”). The closure is usually a traditional flap behind this decorative border. It adds a layer of elegance and dimension to your bed’s look.
Zipper Closure
Less common for standard bedding, but sometimes found in decorative shams or specialty cases. A zipper provides the most secure closure, ensuring the pillow never comes out. It can be less comfortable if the zipper tag is noticeable and some feel it looks less traditional.
Open End (No Closure)
Some simple pillowcases, especially for decorative shams, are just open envelopes. These rely on the pillow’s size and the bed’s arrangement to stay in place. They are easy to put on but can require more frequent adjusting.
Fabric and Material Choices for King Pillowcases
The material of your pillowcase impacts comfort, durability, and care. Here are the most popular options.
Cotton (Percale, Sateen, Flannel)
Cotton is the most widely used and beloved bedding fabric.
- Percale: A crisp, cool, and matte finish. It has a tight plain weave and gets softer with each wash. Great for hot sleepers.
- Sateen: Has a silky, lustrous surface with a slight sheen. It’s softer and warmer to the touch than percale due to a satin weave.
- Flannel: Brushed for extra softness, creating a fuzzy, warm surface. Ideal for colder climates and winter months.
Linen
Linen is made from flax fibers. It’s highly breathable, moisture-wicking, and gets incredibly soft over time. It has a distinctive, relaxed texture and casual wrinkles that are part of its charm. It’s durable and perfect for temperature regulation.
Bamboo or Tencel™ Lyocell
These are modern, eco-friendly options. Fabrics derived from bamboo or eucalyptus (like Tencel) are known for being exceptionally soft, smooth, and thermoregulating. They are often hypoallergenic and resist bacteria, making them a good choice for sensitive skin.
Silk and Satin
Silk (a natural protein fiber) and satin (a type of weave, often from polyester) are known for their smooth feel. They can help reduce friction on hair and skin, potentially minimizing sleep creases and hair frizz. Real mulberry silk is a luxury investment, while satin offers a similar feel at a lower cost.
Step-by-Step Guide to Buying the Right King Pillowcase
- Identify Your Pillow Size: Measure your pillow as described above. Confirm if it’s Standard King (20″x36″) or California King (20″x40″).
- Determine Your Preferred Closure: Decide if you want a traditional flap, an Oxford style, or another closure type based on your aesthetic and practical needs.
- Choose Your Material: Consider your climate and personal feel preference. Do you like crisp (percale), silky (sateen), or breezy (linen)?
- Check Thread Count Wisely: Thread count indicates the number of threads per square inch. A range of 300-500 is often ideal for quality and breathability. Extremely high counts (over 800) can sometimes indicate thinner threads or a denser, less breathable fabric.
- Read Care Instructions: Ensure the cleaning method (machine wash, dry clean, etc.) fits your lifestyle. Some materials like linen require specific care.
- Buy from a Reputable Retailer: This helps ensure you get the size and quality advertised. Check return policies in case the fit isn’t right.
Common Mistakes to Avoid When Shopping
- Assuming “King” is Universal: Always double-check the listed dimensions in inches or centimeters.
- Ignoring Pillow Loft: If you have an extra-plush or down-alternative pillow, you might need an “oversized” king case for a better fit.
- Prioritizing Thread Count Over Material: A 400-thread count Egyptian cotton will often feel better than a 1000-thread count blend of lower-quality fibers.
- Forgetting About Your Sheets: Try to buy pillowcases as part of a set or ensure they match the material and color of your sheets for a cohesive look.
Care and Maintenance for Longevity
Taking good care of your king pillowcases will keep them looking and feeling great for years.
Washing and Drying Tips
- Wash pillowcases regularly, at least once a week, to remove oils, sweat, and skin cells.
- Use a mild detergent and avoid harsh bleaches or fabric softeners, which can break down fibers over time.
- Wash in cool or warm water, not hot, to prevent excessive shrinkage and fading.
- Tumble dry on a low heat setting and remove promptly to avoid deep wrinkles. Line drying is gentlest and can give a fresh scent.
For materials like linen or silk, always follow the specific care lable instructions to prevent damage.
Storing Your Pillowcases
Store clean, dry pillowcases in a cool, dry place. If you rotate bedding seasonally (e.g., flannel for winter), ensure they are completely dry before storing to prevent mildew. A linen closet or drawer is perfect.
Frequently Asked Questions (FAQ)
What are the dimensions of a standard king pillowcase?
A standard king pillowcase in the U.S. is typically 20 inches wide by 36 inches long. This fits a standard king pillow insert of the same dimensions.
Is a king size pillow case the same for all king beds?
No. A standard Eastern King bed uses a 20″ x 36″ pillowcase. A California King bed uses a longer 20″ x 40″ pillowcase. It’s essential to know which type of king mattress you have.
How much bigger should a pillowcase be than the pillow?
A pillowcase should generally be 1 to 2 inches wider and longer than the pillow itself. This allows for the pillow’s fullness and makes it easier to insert and remove, while still maintaining a snug fit.
Can I use a queen pillowcase on a king pillow?
It is not recommended. A queen pillow is 20″ x 30″, so a queen case will be too short for a standard 36″ king pillow. It will be overly tight, strain the seams, and likely not close properly, leading to a poor appearance and accelerated wear.
What is an Oxford king pillowcase?
An Oxford king pillowcase has a decorative fabric border (flange) around all four edges. The closure is usally a hidden flap behind this border. It adds a formal, tailored look to the bedding ensemble.
How do I know if my pillow is standard or California king?
Measure it. Lay it flat and measure the length. If it’s close to 36 inches long, it’s a standard king. If it’s close to 40 inches long, it’s a California king. The width for both will be about 20 inches.
Are European king pillowcases a different size?
Often, yes. A common European king size is 50 x 80 cm, which is roughly 20″ x 40″, similar to a California King size. However, always check the specific product measurements as European sizing can vary.
Choosing the right king size pillow case is a simple task once you know the key measurements and terms. Remember to start by measuring your pillow, then consider the style and fabric that best suits your sleep needs and bedroom decor. With the right fit and material, you’ll enjoy both a beautiful bed and a comfortable place to rest your head every night.