What Size Inserts for 18×18 Pillow Cover | Expert Guide & Tips

Choosing the right pillow inserts can make all the difference in creating cozy and inviting home decor. One of the most common pillow cover sizes is 18×18, making it essential to understand how to choose …

Choosing the right pillow inserts can make all the difference in creating cozy and inviting home decor. One of the most common pillow cover sizes is 18×18, making it essential to understand how to choose the appropriate insert size. This expert guide will provide tips and guidance on selecting the perfect size inserts for your 18×18 pillow covers to achieve both comfort and visual appeal.

Key Takeaways:

  • Choosing the right size pillow inserts for an 18×18 cover is essential for achieving comfort and visual appeal in home decor.
  • Factors such as fill material, fill power, and firmness should be considered when selecting an insert.
  • Various pillow inserts are available, including polyester fiberfill, down alternative, feather, and inserts.

Understanding the Dimensions of an 18×18 Pillow Cover

If you’re looking to choose the perfect size insert for an 18×18 pillow cover, the first step is to understand the standard dimensions of the cover itself. An 18×18 pillow cover means that the length and width of the cover are both 18 inches. However, it’s essential to note that the dimensions of the pillow cover do not necessarily determine the size of the pillow insert you should choose.

It’s common for manufacturers to make pillow covers slightly smaller than the standard size to ensure a snug fit. Therefore, selecting the right size insert for your 18×18 pillow cover is crucial to achieving a plump, comfortable, and visually appealing result.

To ensure you get the correct insert size, measuring your pillow cover accurately is essential. You can do it by using tape and measuring the width and length of the cover while it’s laid flat. Once you have the measurements, you can choose the appropriate size insert for your cover.

Factors to Consider When Choosing Pillow Inserts for an 18×18 Pillow Cover

When selecting the right pillow inserts for an 18×18 pillow cover, there are several factors to consider. These factors determine the final product’s comfort, support, and visual appeal. Here are some key considerations:

Fill Material

The fill material is the primary component of a pillow insert and can significantly impact its overall performance. Common fill materials include polyester fiberfill, down, feather, and down alternatives.

Polyester fiberfill is a budget-friendly synthetic material that is easy to care for. Down and feather inserts are natural materials that provide excellent insulation and a plush feel. Down alternative inserts mimic the feel of down but are hypoallergenic and more affordable.

When selecting your fill material, consider your budget, any allergy concerns, and your desired level of plushness and support.

Fill Power

Fill power refers to the amount of space that one ounce of down or feather material occupies. The higher the fill power, the more insulation the pillow insert will provide. This is particularly important for down and feather inserts, which rely on their fill power to provide warmth and support.

If you prefer a fluffier and fuller pillow, look for inserts with a higher fill power. This will ensure that the pillow maintains its shape and provides adequate support.


The firmness of a pillow insert is determined by its fill material and density. A firmer pillow will provide more support and prevent it from losing shape. A softer pillow will give a more plush and comfortable feel.

The firmness of the pillow insert should be chosen based on your personal preferences and sleeping habits. Select a pillow with a higher fill density if you prefer a firmer pillow for support.


The pillow insert size ensures a snug fit inside the 18×18 pillow cover. The correct size will also prevent the pillow from looking lumpy or misshapen.

When choosing the size of your pillow insert, consider the dimensions of the pillow cover and account for any desired loft or density. A slightly larger pillow insert can provide a fuller and more attractive appearance, while a slightly smaller insert can provide a softer and more relaxed feel.

Recommended Pillow Insert Size for an 18×18 Pillow Cover

When selecting the ideal pillow insert size for an 18×18 pillow cover, there are several factors to consider. These include the fill density, firmness, loft, and personal preferences such as the desired pillow aesthetics.
We recommend choosing an insert size slightly larger than the pillow cover for a snug fit and a visually appealing result. The ideal pillow insert size for an 18×18 pillow cover would be 20×20 or 22×22. This will ensure the pillow is full and plump, with no empty spaces or sagging corners.

Pillow Cover Size Ideal Insert Size
18×18 20×20 or 22×22
20×20 22×22 or 24×24
22×22 24×24 or 26×26

It’s important to note that the fill density and firmness of the insert should also be considered. If you like a firmer pillow, opt for an insert with a higher fill density. If you prefer a softer pillow, choose a lower fill-density insert.
Ultimately, the perfect insert size for an 18×18 pillow cover will depend on your preferences and home decor’s overall look and feel. Don’t be afraid to experiment with different insert sizes and fill materials to find the ideal combination for your space.

Types of Inserts for an 18×18 Pillow Cover

Choosing the right type of pillow insert is crucial in achieving the perfect look and comfort for your 18×18 pillow cover. Here are the most popular types of inserts available in the market:

Insert Type Fill Material Pros Cons
Polyester Fiberfill Synthetic polyester fibers – Affordable
– Hypoallergenic
– Easy to wash and maintain
– Less durable than other materials
– May flatten over time
Down Alternative Synthetic materials that mimic the feel of down – Affordable
– Hypoallergenic
– Soft and comfortable
– May not be as fluffy as real down
– May flatten over time
Feather Natural feathers – Soft and comfortable
– Provide good support
– May cause allergies for some individuals
– May make noise when compressed
Down Natural down feathers – Soft and luxurious
– Provides excellent support
– Expensive
– May cause allergies for some individuals
– May require frequent fluffing

When choosing the type of insert, it is essential to consider the level of comfort and support you require and any personal preferences or allergies. Check the label for the fill material and the manufacturer’s recommendations for washing and care.

Enhancing Your Home Decor with the Right Inserts

Choosing the right inserts for your 18×18 pillow covers can play a crucial role in enhancing your home decor. The correct insert size, fill material, and firmness can help make a cohesive and stylish look that complements your furniture and color scheme. Here are some tips to help you achieve the perfect pillow arrangement:

1. Consider the Style of Your Room

The style of your room should be a crucial factor when selecting inserts for your pillow covers. For instance, feather or down inserts may be an excellent option if your decor style is more traditional. On the other hand, if you prefer a more contemporary style, polyester fiberfill or down alternative inserts may be more suitable.

2. Layer Your Inserts

Layering your inserts can also help enhance your decor and create a visually appealing result. You can achieve this by selecting a larger insert size than your pillow cover and placing it at the back. This will make a fuller appearance and help fill out any gaps in the cover.

3. Mix and Match Colors and Textures

Mixing and matching colors and textures of your pillow inserts can add depth and interest to your decor. For example, if your couch is neutral, you can create a pop of color by choosing a brightly colored insert. Alternatively, if your furniture is made of natural wood or leather, you can choose a textured insert to add interest and contrast.

4. Play with Shapes and Sizes

Playing with different shapes and sizes of your pillow inserts can add variety and dimension to your decor. You can experiment with different shapes, such as lumbar pillows or oversized square pillows, to create a unique and personalized look.

5. Don’t Forget the Importance of Comfort

While choosing pillow inserts that enhance your decor is essential, don’t forget the importance of comfort. Select inserts that provide the right support and firmness to ensure maximum comfort when lounging on your couch or bed.

How to Measure and Choose the Perfect Insert Size

Choosing the right insert size for an 18×18 pillow cover can make all the contrast in achieving a polished and cohesive look in your home decor. Here are some expert tips to guide you:

  1. measure your pillow cover: To determine the appropriate insert size, measure the length and width of your pillow cover. A well-fitted insert should be the same size as the cover or slightly more significant for a fuller look.
  2. Consider the fill density: Consider how firmly you want your pillow to be filled. A high fill density is ideal for decorative pillows, while a lower density provides a softer, more comfortable pillow for lounging.
  3. Choose the right fill material: Select the fill material based on your needs and preferences. Polyester fiberfill is affordable and hypoallergenic, while down inserts offer a luxurious and soft feel. Feather inserts provide firm support but may be less suitable for allergy sufferers.
  4. Think about pillow aesthetics: Consider how the insert size and firmness will impact the overall look of your pillow. A more oversized insert will provide a snugger fit and fuller appearance.
  5. Experiment with different options: Don’t be afraid to try different insert sizes and materials to achieve your desired look. Some combinations may surprise you with how visually appealing they can be! 

Following these steps, you can boldly select the perfect insert size for your 18×18 pillow cover and elevate your home decor to the next level.

Where to Find High-Quality Pillow Inserts for an 18×18 Pillow Cover

When finding high-quality pillow inserts for an 18×18 pillow cover, it’s important to research and choose a reputable source. Here are some options to consider:

Option Description
Specialty Home Decor Stores Many home decor stores offer a variety of pillow inserts in different sizes and materials. Visit your local store and ask for recommendations from the staff, who may be able to offer insight into the best options for your needs.
Online Marketplaces Online marketplaces such as Amazon, Etsy, and Wayfair offer various pillow inserts in different sizes and materials. Be sure to read reviews and check the seller’s reputation before purchasing.
Bedding Retailers Many bedding retailers offer pillow inserts in various sizes and materials. Check out Bed Bath & Beyond, Target, and Walmart stores for affordable options.

When selecting a source for your pillow inserts, consider the material, fill power, and firmness that will best suit your needs. Additionally, check the return policy and any warranty the seller offers.

Tip: Consider purchasing an extra insert or two to have on hand for when you want to switch up your pillow arrangements.

Expert Tips for Caring and Maintaining Pillow Inserts

Caring for your pillow inserts ensures their longevity and optimal performance. Here are some expert tips on how to maintain your inserts:

  1. Fluff your inserts regularly: To keep your pillows looking plump and cozy, give them a good fluff and shake them regularly. This helps redistribute the fill and prevents clumping.
  2. Rotate your inserts: Alternating between different pillow inserts can help distribute wear and tear evenly, prolonging their lifespan.
  3. Spot clean when possible: If your pillow insert has a stain or spill, spot-clean it with a damp cloth and gentle detergent rather than washing the whole insert.
  4. Wash when necessary: If your pillow inserts become excessively soiled, wash them according to the care instructions on the label. Use a gentle cycle and gentle detergent, and avoid using fabric softeners as they can harm\ the fill.
  5. Fluff in the dryer: After washing, throw your pillow and put it on low heat with some dryer balls or clean tennis balls. This helps fluff the fill and distribute it evenly.
  6. Store in a dry place: Make sure to store your pillow inserts in a cool, dry place to intercept moisture buildup and potential mold growth. Abstain from keeping them in plastic containers, as they need to breathe.

With proper care and maintenance, your pillow inserts can last for years and continue to provide comfort and support for your home decor. Remember to choose the right size and type of insert for your 18×18 pillow cover, and follow these expert tips for keeping them in top condition.

Alternatives to Pillow Inserts for 18×18 Pillow Covers

Many creative and budget-friendly options are available if you’re looking for alternative options to fill your 18×18 pillow cover. Here are a few ideas:

Decorative Pillow Forms

Pros Cons
Easy to find in various sizes and shapes May not provide the same level of customization as traditional inserts
Can be used multiple times May not fit snugly inside the cover
Can add texture and dimension to pillow arrangements Can be more expensive than conventional inserts

Decorative pillow forms are a great alternative to traditional pillow inserts and can be found at most home decor stores. They come in various sizes, shapes, and textures, providing endless possibilities for creating unique and stylish pillow arrangements.

Repurposed Pillows

  • Use old pillows that are no longer filler for your pillow cover.
  • Remove the old cover and stuff the pillow filler into the new body.
  • Ensure the old pillow is of appropriate size and firmness for your desired pillow aesthetics.
  • This is a great way to repurpose old pillows and reduce waste.

DIY Fillers

“One man’s trash is another man’s treasure.”

– English Proverb

You can get creative and use various materials around your home as DIY fillers for your 18×18 pillow cover. Here are a few ideas:

  • Old T-shirts or sweaters
  • Unused fabric scraps
  • Shredded foam or memory foam
  • Bean bag filling or rice

Using DIY fillers is not only budget-friendly, but it also adds a unique and personal touch to your home decor.

With these alternative options, there is no need to stick to traditional pillow inserts. Get creative and experiment with different materials to find the ideal filler for your 18×18 pillow cover.


Choosing the right size pillow insert for an 18×18 pillow cover is essential for achieving the perfect look and feel for your home decor. By understanding the dimensions of your pillow cover and considering important factors such as fill material and firmness, you can ensure that you select the correct insert for your needs.
When choosing a pillow insert, it’s essential to consider its visual impact on your overall decor. By selecting a high-quality insert that matches your style, you can create a stylish look that will enhance any room.
Remember to measure your pillow cover accurately and choose an appropriate fill density for the desired firmness. In addition, be sure to care for and maintain your pillow insert properly to prolong its lifespan and keep it looking its best.
If you’re looking for alternative options for filling your 18×18 pillow cover, consider using decorative pillow forms, repurposing old pillows, or DIY fillers. Get creative and have fun experimenting with different options!
Thank you for reading our expert guidelines on size inserts for 18×18 pillow covers. We hope you found it informative and helpful in selecting the perfect pillow insert for your needs. Happy decorating!


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