Understanding what the size of a king pillow is can make a huge difference in your sleep comfort and bedroom aesthetics. A king pillow measures 20 inches by 36 inches, making it noticeably longer than standard and queen options. This guide breaks down everything you need to know about king pillow dimensions, how to choose the right one, and how it fits into your overall bedding setup.
Key Takeaways
- Standard king pillow dimensions: A king pillow measures 20 inches wide by 36 inches long, making it the longest standard pillow size available.
- Comparison to other sizes: King pillows are 6 inches longer than standard pillows (20×30) and 6 inches longer than queen pillows (20×30), though queen pillows are sometimes listed at 20×30 as well depending on the manufacturer.
- Best for king-size beds: King pillows are designed to fit perfectly across the width of a king or California king bed without leaving awkward gaps.
- Material matters: The size of a king pillow is only part of the equation — choosing the right fill material like memory foam, down, or down alternative is equally important for comfort.
- Pillowcase compatibility: You need king-specific pillowcases (20×36 or 20×37) to properly fit a king pillow without bunching or excess fabric.
- Sleeping position affects choice: Side sleepers and back sleepers benefit most from king pillows, while stomach sleepers may find them too large.
- Internal linking opportunity: Understanding pillow sizes helps when exploring related topics like what is the size of a standard pillow or comparing different pillow types.
Quick Answers to Common Questions
What are the exact dimensions of a king pillow?
A king pillow measures 20 inches wide by 36 inches long. This is the standard size used by most bedding manufacturers in the United States.
Can I use king pillows on a queen bed?
Yes, you can use king pillows on a queen bed, but they will hang over the edges slightly since a queen bed is 60 inches wide and two king pillows span about 40 inches. Some people prefer the extra length for comfort.
How many king pillows do I need for a king bed?
Most people use two king pillows on a king-size bed. This provides full coverage across the 76-inch width of the bed with a small overlap in the center.
What size pillowcase fits a king pillow?
King pillowcases are typically 20 by 36 inches or 20 by 37 inches. Always check the specific product dimensions to ensure a proper fit.
Are king pillows good for side sleepers?
Yes, king pillows are excellent for side sleepers because the extra length provides more surface area for head and neck support. Just make sure to choose the right loft for your shoulder width.
📑 Table of Contents
What Is the Size of a King Pillow?
If you’ve ever shopped for bedding and felt confused by the different pillow sizes, you’re not alone. One of the most common questions people ask is, “what is the size of a king pillow?” It’s a simple question, but the answer can have a big impact on how comfortable your bed feels every night.
A king pillow measures 20 inches wide by 36 inches long. That makes it the longest of the standard pillow sizes you’ll find in most stores. It’s specifically designed to span the full width of a king-size bed, which is about 76 inches wide. When you place two king pillows side by side, they cover the bed beautifully without leaving that awkward gap in the middle that you sometimes get with smaller pillows.
But size isn’t everything. The material inside the pillow, the loft (that’s the height or thickness), and even the pillowcase you pair it with all play a role in how comfortable your sleep experience will be. Let’s dive deeper into everything you need to know about king pillows so you can make the best choice for your bedroom.
King Pillow Dimensions Compared to Other Sizes
King vs. Standard Pillow
The most common comparison people make is between a king pillow and a standard pillow. A standard pillow measures 20 inches by 30 inches. That means a king pillow is the same width but a full 6 inches longer. This extra length makes a noticeable difference, especially if you’re a taller person or if you tend to move around a lot during the night.
On a standard or full-size bed, two standard pillows fit perfectly. But on a king bed, two standard pillows leave a visible gap in the center. King pillows solve that problem entirely.
King vs. Queen Pillow
Queen pillows typically measure 20 inches by 30 inches, though some manufacturers list them at 20 by 32 inches. Either way, a king pillow is still the longer option at 36 inches. If you’re trying to decide between a king size pillow vs queen, the main consideration is your bed size. A queen bed is 60 inches wide, so two queen pillows work fine. But on a king bed, king pillows are the better fit.
Quick Size Reference
- Standard pillow: 20″ x 30″
- Queen pillow: 20″ x 30″ to 20″ x 32″
- King pillow: 20″ x 36″
Why Choose a King Pillow?
Perfect for King and California King Beds
The most obvious reason to choose a king pillow is that you have a king-size bed. A standard king bed is 76 inches wide, and a California king is 72 inches wide. Two king pillows placed side by side measure 40 inches across, which gives you full coverage with a small overlap in the center. It looks clean, feels comfortable, and eliminates that annoying gap.
Better Support for Larger Sleepers
If you’re a bigger person or someone who moves around a lot in their sleep, the extra length of a king pillow gives you more room to work with. You won’t wake up with your head hanging off the edge of the pillow, which can cause neck strain and disrupt your sleep.
Ideal for Back and Side Sleepers
King pillows are particularly popular among back sleepers and side sleepers. The extra surface area provides better support for your head, neck, and shoulders. If you’re a side sleeper, you might also want to check out our guide on what is a good pillow for side sleepers to find the perfect match for your sleeping style.
What to Look for When Choosing a King Pillow
Fill Material
The size of a king pillow tells you the dimensions, but the fill material determines how it feels. Here are the most common options:
- Memory foam: Contours to your head and neck for personalized support. Great for people with neck or back pain. Learn more about what is a memory foam pillow to see if it’s right for you.
- Down: Soft, luxurious, and lightweight. Down pillows are a classic choice for people who love a plush feel.
- Down alternative: Hypoallergenic and budget-friendly. These mimic the feel of down without using natural feathers.
- Latex: Firm, responsive, and naturally hypoallergenic. Latex pillows are durable and great for people who want consistent support.
Loft and Firmness
Loft refers to how thick or tall the pillow is when it’s fluffed up. Your ideal loft depends on your sleeping position:
- Side sleepers: Medium to high loft (5-6 inches) to fill the gap between your shoulder and head.
- Back sleepers: Medium loft (4-5 inches) to keep your neck aligned with your spine.
- Stomach sleepers: Low loft (2-4 inches) to prevent your neck from tilting too far back.
Cover Material
Don’t overlook the pillow cover. A breathable, moisture-wicking cover can make a big difference in how cool and comfortable you stay throughout the night. Cotton, bamboo, and Tencel are all popular choices for pillow covers.
How to Pick the Right King Pillowcase
Once you know what the size of a king pillow is, the next step is finding the right pillowcase. King pillowcases are typically 20 inches by 36 inches or 20 inches by 37 inches. The slight variation depends on the brand, so always check the product description before buying.
Using a standard pillowcase on a king pillow is a common mistake. It will be too short, and you’ll end up with the pillow bunching up inside the case or the fabric stretching uncomfortably tight. For a detailed breakdown, check out our guide on what size is a king pillowcase.
Here are a few tips for choosing the right pillowcase:
- Measure your pillow first. Even though king pillows have a standard size, some brands run slightly larger or smaller.
- Choose the right fabric. Cotton percale is crisp and cool, while cotton sateen is silky and smooth.
- Consider a pillow protector. A pillow protector goes between your pillow and pillowcase to keep it clean and extend its lifespan.
Common Mistakes When Buying King Pillows
Ignoring Your Sleeping Position
Buying a king pillow just because you have a king bed isn’t enough. Your sleeping position should guide your choice of loft and firmness. A pillow that’s too thick or too thin can lead to neck pain and restless nights.
Choosing Based on Price Alone
It’s tempting to grab the cheapest king pillow on the shelf, but a low-quality pillow will flatten out within weeks and leave you worse off than before. Invest in a quality pillow that will maintain its shape and support for at least one to two years.
Forgetting About Pillow Maintenance
Even the best king pillow needs proper care. Wash your pillowcases weekly, use a pillow protector, and fluff your pillow daily to maintain its shape. Most pillows should be replaced every 12 to 18 months, depending on the material.
Conclusion
So, what is the size of a king pillow? It’s 20 inches by 36 inches — the longest standard pillow size designed to fit king and California king beds perfectly. But choosing the right king pillow goes beyond just knowing the dimensions. You need to consider the fill material, loft, firmness, and your personal sleeping position to find the pillow that gives you the best night’s sleep.
Take your time, do your research, and don’t be afraid to try a few different options. Your pillow is one of the most important pieces of bedding you own, and getting it right can transform the quality of your sleep. Whether you prefer the contouring support of memory foam or the plush softness of down, there’s a king pillow out there that’s perfect for you.
Frequently Asked Questions
What is the difference between a king pillow and a standard pillow?
A king pillow measures 20 by 36 inches, while a standard pillow measures 20 by 30 inches. The king pillow is 6 inches longer, making it better suited for king-size beds and taller sleepers who need more surface area.
Do king pillows fit in standard pillowcases?
No, king pillows do not fit properly in standard pillowcases. Standard pillowcases are designed for 20 by 30 inch pillows, so they will be too short for a king pillow. You need king-size pillowcases for the best fit.
What is the best fill material for a king pillow?
The best fill material depends on your personal preferences and sleeping position. Memory foam is great for targeted support, down offers a luxurious soft feel, and down alternative is ideal for allergy sufferers who want a similar plush experience.
How often should I replace my king pillow?
Most experts recommend replacing your king pillow every 12 to 18 months. Over time, pillows lose their shape and accumulate dust mites, dead skin cells, and allergens that can affect your sleep quality and health.
Can I wash a king pillow in a washing machine?
It depends on the fill material. Most down and down alternative pillows can be washed in a front-loading washing machine on a gentle cycle. Memory foam pillows should not be submerged in water — instead, spot clean them and air dry.
What is the weight of a typical king pillow?
The weight of a king pillow varies by fill material. A king down pillow typically weighs around 2 to 3 pounds, while a king memory foam pillow can weigh 4 to 6 pounds or more depending on the density of the foam.