1. Standard Pillowcase Sizes.

Standard pillowcases are the most commonly purchased by consumers and are available in various sizes. The standard-size pillowcase measures 20 inches by 26 inches (51 x 56 cm) and fits both standard and queen-size pillows. These pillowcases are ideal for twin or twin XL mattresses, but they can also be used for full-size and queen-size beds. For king-size beds, it is recommended to use three standard-size pillowcases to achieve the desired look. Another variant of the standard pillow is the super standard size, which is two inches longer and fits larger pillows.

2. Super Standard Pillowcase Sizes.

The super standard size pillowcase is 20 inches by 28 inches, or 51 centimeters by 71 centimeters. Accordingly, these pillowcase dimensions are two inches longer than the standard size, providing a more relaxed fit around your pillow. This size is perfect if you like a little extra room for your pillow, ensuring it stays snugly covered all night long. Plus, the added space promotes breathability, keeping you cool and comfortable as you drift off to sleep.

3. Queen Size Pillowcase.

Measuring 20 inches by 30 inches (51 x 76 cm), queen-size pillowcases are specifically designed for queen-size pillows. These pillowcases provide a perfect fit without bunching up at the ends. They are ideal for queen-size beds and can also be used for full-size beds to create a fuller and proportionate look.

4. King Size Pillowcase.

King-size pillowcases are meant to accommodate king-size pillows and are typically the largest pillowcase sizes available. With dimensions of 20 inches by 36 inches (51 x 92 cm), they are ten inches longer than standard-size pillowcases. King-size pillowcases are suitable for king-size mattresses and can also be used in smaller beds for single sleepers.

5. Body Size Pillowcase.

Body pillowcases are designed to fit over body pillows, which are larger and longer than standard pillows. The standard body pillow size measures 20 inches by 54 inches (51 x 137 cm), making it the largest and longest pillowcase available. However, the shape of your body pillow may require a custom-made pillowcase, especially if it is C-shaped, U-shaped, or J-shaped.

6. Specialty Pillowcase Sizes.

Specialty pillows come in various shapes and sizes to cater to different sleepers’ needs. These pillows may require custom-made pillowcases as they do not follow standard sizing guidelines. Below are some examples of specialty pillowcases:
① Euro Pillow.
Euro pillows, also called euro sham pillows, are large square pillows used for decorative purposes. They measure around 26 inches by 26 inches (66 x 66 cm) and require specially designed euro pillowcases. Euro pillows are often placed behind standard, queen, or king pillows to enhance the visual appeal of a room.
② Travel Pillow.
Travel pillows are compact and convenient alternatives to regular pillows for trips. They come in rectangular or C-shaped designs, with rectangular pillows measuring around 12 inches by 16 inches (30 x 41 cm). Travel pillowcases are usually easy to find and come in various colors and patterns. However, C-shaped travel pillows often have built-in covers that cannot be removed.
③ Throw Pillow.
Throw pillows are mainly used for decorative purposes and can come in various shapes and sizes. Square-shaped throw pillows are the most popular and offer a wide variety of pillowcase options. You can find throw pillowcases in a range of designs, patterns, and colors to suit your style preferences.
④ Orthopedic Pillow.
Orthopedic pillows are crafted to support specific body parts and promote healthier sleep postures. These pillows come in different shapes and sizes to cater to various sleeping needs. Finding the right pillowcase for an orthopedic pillow can be challenging due to their distinctive shapes. It may be necessary to order a custom design or check if the pillow comes with a matching pillowcase.
⑤ Pregnancy Pillow.
Pregnancy pillows are specially designed to provide comfort and support during pregnancy. They come in a variety of shapes, sizes, fabrics, and fillings to accommodate a growing body. Some pregnancy pillows are wedge-like or bean-shaped, while others are extra-long to support the entire body. Pillowcases for pregnancy pillows are often custom-made or have non-removable covers.