Best Pillowcase Sizes (in & cm) — Standard, Queen, King, Body (2026)

Pillowcases are meant to protect your pillow from stains, spills, or other damage. A good pillowcase will also be breathable and fit your pillow perfectly, allowing you to sleep well without worrying about the pillowcase falling off or bunching up.

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What Are the Standard Pillowcase Sizes in Inches and Centimeters?

The four standard pillowcase sizes are Standard (20×26″), Queen (20×30″), King (20×36″), and Body (20×54″). As a general fit rule, your pillowcase should be 1–2 inches larger than your pillow on each dimension — enough for a snug fit without bunching or seam strain. Always match your case to your pillow size, not your mattress size.

Note: These are US standard measurements. European pillowcase standards differ slightly – for example, a US standard pillowcase measures 20″ x 26″, while UK/European standard pillowcases are often larger. When shopping internationally or for imported bedding, always verify the specific dimensions to ensure proper fit.

Fit tips: Aim for a tailored look without straining seams. For gusseted or down‑loft inserts, choose the next size up; for flatter inserts, the listed size usually fits best.

If your insert is especially lofty, consider sizing the case up by ~1–2″ in length for easier on/off and a smoother finish. For a tidy, secure fit, choose pillowcases with envelope or zippered closures to prevent the insert from sliding out.

For hot sleepers, a pillowcase in the freezer — sealed in a zip bag and placed in the freezer for a few minutes before bed — can offer brief but effective cooling relief, and works best with percale or linen cases.

When Should You Use a Standard Size Pillowcase?

A standard pillowcase fits a 20×26″ pillow and works best on twin, twin XL, and full mattresses, where one or two standard pillows sit comfortably without overhanging. If your pillow is especially lofty or you’re using a queen-size insert, size up to a queen case for a cleaner, less strained fit.

Pillow Dimensions: 20 inches by 26 inches

Standard size pillowcases are made to fit standard and queen size pillows. The extra material on one end can cover the longer length of a queen pillow and still look aesthetically pleasing.

In practice, Standard cases are designed for 20″×26″ pillows; some brands’ longer Standard cases can accommodate a 20″×30″ Queen insert, but a true Queen case is a more consistent fit.

The small size makes standard size pillowcases ideal for pillows you can fit on twin and twin XL size mattresses. Two standard pillows can also rest comfortably side by side on a full or queen mattress.

Twin, twin XL, and full size bedding sets usually come with one standard pillowcase, but for larger sizes, like queen, king, and California king, the set will come with two.

Another offshoot of the standard size pillowcase is the super standard size. While it’s not as common, the super standard size pillowcase is two inches longer to fit larger pillows (so 20 inches by 28 inches). It can fit both standard and super standard pillows, but may be too small for king size pillows.

Match your pillowcase to the right pillow size.

When Should You Choose a Queen Size Pillowcase?

A queen pillowcase fits a 20×30″ pillow and is the right choice when two pillows need to stretch cleanly across a queen, king, or California king mattress without overhang. If 

you’re a combination sleeper who shifts positions often, the extra four inches of length compared to a standard case also provides more consistent head and neck support.

Pillow Dimensions: 20 inches by 30 inches

Queen pillowcases are four inches longer than the standard size. The longer size allows two queen pillows to stretch perfectly across a queen size mattress. They also fit nicely with a king or a California king bed.

Some queen pillows can fit inside standard pillowcases depending on the brand. The width is the same, but because standard pillowcases tend to be longer, they can adequately fit a queen pillow.

If you tend to toss and turn at night, a longer pillow might be a good idea anyway. The extra length keeps your head and neck supported as you switch sleeping positions.

Rule of thumb: Use a Queen case for a 20″×30″ Queen insert; try a longer Standard case only if the fit is smooth and not overly tight.

When Should You Choose a King Size Pillowcase?

A queen pillowcase fits a 20×30″ pillow and is the right choice when two pillows need to stretch cleanly across a queen, king, or California king mattress without overhang. If you’re a combination sleeper who shifts positions often, the extra four inches of length compared to a standard case also provides more consistent head and neck support.

Pillow Dimensions: 20 inches by 36 inches

King size pillowcases are designed to fit king pillows. They’re 10 inches longer than a standard size and are too big for pillows smaller than a king.

Side by side, two king pillows comfortably fit across the 76-inch width of a king size mattress. They can also fit on a California king size bed.

You could use two king sized pillows on a queen mattress, but it may be too tight. The pillows might hang over the edges of the bed.

If you’re a combination sleeper and have a queen sized mattress, it may be better to stick with queen pillows.

Tip: King pillows work best with king mattresses due to their length. For Queen mattresses, two Queen pillows (20″×30″) fit edge‑to‑edge more cleanly than two Kings. 

When Should You Use a Body Size Pillowcase?

A standard body pillowcase fits a 20×54″ I-shaped body pillow, but the right case depends on your pillow’s shape — C-, U-, and J-shaped body pillows typically require brand-specific covers rather than standard body cases. If your body pillow didn’t come with a case, check with the manufacturer before assuming a standard body pillowcase will fit.

Pillow Dimensions: 20 inches by 54 inches (standard body pillow)

Body pillowcases are the longest and largest pillowcases available. They’re designed to fit over a body pillow, though the one you need depends on the shape of your body pillow.

The standard body pillow is I-shaped (straight and rectangular). Extra-long versions of this style measure 20 inches by 60 inches or even 72 inches for taller users. Body pillows also come in specialty shapes including C-, U-, and J-shaped designs that provide targeted support for different sleeping positions and are often used as pregnancy pillows.

C-shaped versions support both belly and back, U-shaped provide full-body support, and J-shaped combine head support with body alignment. Standard I-shaped body pillows are frequently used during pregnancy, while the contoured shapes offer more targeted support for expectant mothers.

To use a body pillow, set the one end beneath your head and neck, and curve the other end around your body to tuck between your legs.

Some body pillows don’t come with a matching pillowcase, so you may have to do some extra searching for the right pillowcase. Having a pillowcase can save you from washing your body pillow too often.

Quick reference: Specialty C/U/J‑shaped body pillows often require brand‑specific covers. 

What Are Specialty Pillowcase Sizes?

Specialty pillowcases — including Euro (26×26″), Boudoir (12×16″ or 14×20″), Oxford, bolster, travel, and throw sizes — don’t follow standard sizing guidelines and often require brand-specific covers or specialty bedding retailers. If you have an orthopedic, contoured, or C/U/J-shaped pillow, check with the pillow manufacturer first, as many specialty pillows ship with their own purpose-made covers.

For specialty pillows, you can find matching pillowcases or decorative bed shams. These custom pillowcases don’t follow common sizing guidelines. Instead, you may need to do further research to find a pillowcase to match the special size, including Euro, orthopedic, travel, and throw pillows.

Want to compare function vs décor? See pillowcases vs pillow shams.

Euro

Euro-style pillowcases are designed to fit Euro pillows (popularized in Europe, hence their name). These large, square pillows measure 26 inches by 26 inches. Euro pillows are popular in America for decoration or to lean against when watching TV or reading a book.

If you use your Euro pillows for decoration, you may not think they need a pillowcase. However, covering the pillows repels dirt and stains (or at least camouflages them), keeping the pillow clean. So choosing the right size pillowcase is important!

Boudoir

Boudoir pillowcases are small decorative cases, typically measuring 12″ x 16″ or 14″ x 20″, designed for accent pillows. These petite pillowcases often feature intricate embroidery, lace trim, or other embellishments and serve as the finishing touch in bedroom styling. They’re also popular as christening gifts for decorating baby bassinets.

Oxford

Oxford pillowcases fit standard queen-size pillows (20″ x 30″) but feature a distinctive wide, flat hem around the border, typically 2-4 inches wide. This decorative border creates a more refined, tailored appearance compared to standard pillowcases with plain hems.

Orthopedic

Orthopedic pillows come in many different shapes and sizes—there is no orthopedic pillow that can fulfill everyone’s different sleeping needs. Each unique shape follows orthopedic guidelines to encourage healthy alignment during sleep. Some orthopedic pillows are designed to rest under your head and neck, while others lie under your legs.

Finding an orthopedic pillowcase can be tricky because of their uncommon shape. Check with the pillow brand and see if the pillow comes with a case, or if the company sells the corresponding pillowcase separately.

Bolster

Bolster pillows are cylindrical pillows that bridge the gap between standard pillows and body pillows. Measuring 6-8 inches in diameter and typically 14-36 inches in length, bolsters provide firm, targeted support for specific body areas.

Unlike the flat design of traditional body pillows, bolsters are commonly placed under the knees, ankles, or along the spine for orthopedic support.

Bolster pillowcases are tube-shaped with gathered ends, requiring precise measurement of both diameter and length for proper fit. Finding replacement covers often requires specialty bedding retailers, as standard pillowcase manufacturers rarely carry these unique dimensions.

Travel

Travel pillows are compact, making them easy to pack with your belongings for trips. Travel pillows come in two different sizes—rectangular or C-shaped.

C-shaped travel pillows are more common since the pillow wraps around your neck and provides a place to rest your head comfortably during long trips. C-shaped travel size pillowcases are rare. More often, the cover is built-in, but not removable.

Rectangular travel pillows are also referred to as toddler pillows because they’re essentially smaller versions of the standard size and also meant for toddlers. These pillowcases are much easier to find and usually come in different colors.

Throw

Throw pillows vary in size, but most are square-shaped. Throw pillows are strictly decorative pillows, though you can use them to elevate sections of your body.

During the day, you can arrange pillows on your bed so your sleeping pillow is propped up with a throw pillow in front. Then at night, you simply move these around and lie down for sleep.

Out of all the pillowcases, throw pillowcases have a greater variety of colors, patterns, and designs. Many of them are pillow shams meant more for decoration than use.

You can easily find throw pillowcases to suit your style and change the appearance of any living space, such as using these pillows in different sizes to make your bed look like a couch.

Mixing throw pillowcases in different colors or textures is also one of the easiest entry points into intentionally mismatched bedding design, letting you refresh a room’s look without replacing your entire sleep setup.

Do Pillows Need a Pillowcase?

Yes — pillowcases protect pillow materials from sweat, oils, allergens, and bacteria, and should be washed weekly. Research shows pillowcases can accumulate millions of colony-forming units of bacteria within a week of use, making regular washing as important as having a case in the first place. For extra protection against liquids or allergens, pair a pillowcase with a waterproof pillow protector underneath.

You should keep your pillow inside a pillowcase to protect its materials, particularly if you’re interested in a pillow spray for sleep. Some non-standard pillows may include a specialty case with purchase.

For example, some pillows for neck pain may have a contoured design that keeps you from slipping a traditional pillowcase over it. Wedge pillows also usually include a cover that fits over the ramp-like fill.

And it’s important to not just use a pillowcase but change it regularly. Ideally, you want to change a pillowcase once a week.

Our data on bacteria in bed shows pillowcases can accumulate between three and five million colony-forming units of bacteria after just one week of use, climbing to nearly 12 million by week four. And swapping out pillowcases limits this bacteria growth.

Bottom line: Use a pillowcase for nightly sleep (hygiene and comfort) and add a protector if spills/allergens are a concern; specialty pillows often ship with purpose‑made covers. 

Other Mattress and Bedding Size Guides

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• Mattress Sizes and Dimensions in Canada
• Bunk Bed Mattress Size Guide
• Bed Sheet Sizes and Dimensions Guide
• Hospital Bed Mattress Sizes and Dimensions
• Bed Frame Sizes and Dimensions Guide
• Mattress Protector Sizes and Dimensions Guide
• Adjustable Bed Sizes and Dimensions Guide
• Blanket Sizes and Dimensions Guide
• Murphy Bed Sizes and Dimensions Guide
• Bed Pillow Sizes Guide
• Headboard Sizes Chart and Dimensions Guide
• Mattress Foundation Sizes and Dimensions Guide
• Duvet Sizes and Dimensions Guide
• Comforter Sizes and Bedding Chart

FAQs

Do queen size pillows fit inside standard cases?

Some queen pillows fit standard cases, but if seams strain or fabric bunches, use a queen case for a cleaner finish.

What is a sham pillow?

A pillow sham is a decorative cover that fits over standard pillows, completely enclosed with back opening and extra fabric edges for embellishment.

At a glance: Pillowcases = sleep and hygiene; shams = decorative front covers.

How often should you wash your pillowcase?

Weekly washing removes allergens, dust mites, and sweat for most people. Increase frequency for acne-prone skin or allergies.

Are pillows machine-washable?

Most fiberfill pillows are machine-washable on delicate cycles. Don’t machine-wash solid memory foam/latex! Spot-clean foam and wash removable covers only.

How are pillow sizes measured?

Measure seam-to-seam and match case to insert. Size up 1–2″ for high-loft inserts to prevent over-tight fitting.

How much bigger should a pillow cover be than the pillow?

Pillowcases should be 1-2″ longer and 2-4″ wider than the pillow. Add another 1-2″ for high-loft pillows to prevent seam strain.

How often should I change a pillowcase?

Change weekly like bed sheets since your face contacts fabric 7-8 hours nightly. Increase to twice weekly for acne-prone skin or heavy hair product use.

How many pillowcases should I have?

Have 2-3 pillowcases per pillow for regular washing rotation. This ensures you have clean options while changing pillowcases and throwing them into the wash.

Do pillowcases make a good gift?

Yes, pillowcases make excellent gifts for sleep when paired with quality pillows or as part of a bedding set, especially in premium fabrics like Egyptian cotton, silk, or linen. They’re practical, universally needed, and can be personalized with colors or patterns to match the recipient’s bedroom décor or sleep preferences.

Conclusion

Pillowcases protect your pillows from allergens and dirt. Finding the right pillow size allows you to fully enjoy your pillow. A pillowcase or pillow protector that’s too small can damage a pillow and cause it to flatten. If the pillow doesn’t have enough room to expand, it can’t be fluffed to the right height.

Need help choosing between sleep vs décor covers? Compare pillowcases vs pillow shams.

After you find the right pillowcase size, you can choose colors, patterns, and fabrics to meet your preferences. Accessorize with sham pillows or just stick with one bed pillow for sleep!