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What Size Pillow Insert For 18×18 Cover? Choose The Perfect Fit!


What Size Pillow Insert For 18x18 Cover

When it comes to decorating your living space, throw pillows are a fantastic way to add style, comfort, and personality to your furniture. Whether you’re looking to revamp your sofa, bed, or accent chair, finding the perfect pillow insert size for your pillow cover is essential for achieving the desired look and feel. In this article, we will explore the topic of choosing the right pillow insert size for an 18×18 pillow cover and provide you with valuable insights and recommendations.

Throw pillows are not only decorative but also serve a functional purpose, providing support and comfort. However, to ensure your pillows look their best, it’s crucial to select the appropriate pillow insert size for your pillow cover. When it comes to an 18×18 pillow cover, the pillow insert size plays a vital role in achieving the desired plumpness and aesthetic appeal.

Understanding Pillow Inserts And Cover Sizes

Before diving into the specifics, it’s important to understand the relationship between pillow inserts and cover sizes. Pillow inserts are typically sold separately from the covers and come in various sizes to fit different cover dimensions. The insert should be slightly larger than the cover to ensure a full and well-filled appearance.

Importance Of Choosing The Right Pillow Insert Size

Choosing the right pillow insert size is of utmost importance when it comes to achieving the desired look and comfort for your throw pillows. The size of the insert directly influences the overall appearance of the pillow, whether it appears flat and deflated or plump and inviting. By selecting the appropriate insert size, you can ensure that your pillows look visually appealing and well-filled, creating an inviting atmosphere in your living space.

Moreover, the right pillow insert size plays a crucial role in providing optimal comfort and support. A well-filled pillow with the correct insert size offers the right level of firmness, allowing you to relax and enjoy the cozy embrace of your pillows. On the other hand, using an incorrect insert size may lead to discomfort and a lack of support, compromising your overall enjoyment and relaxation.

Beyond aesthetics and comfort, choosing the right pillow insert size also helps maintain the longevity of both the insert and the pillow cover. Ill-fitting inserts can cause excessive wear and tear on the fabric, leading to premature fraying, stretching, or even tearing. By selecting the appropriate size, you can ensure that the insert fits snugly within the cover, reducing the strain on the fabric and extending the lifespan of your pillows.

Factors To Consider When Selecting Pillow Inserts

When selecting a pillow insert size for your 18×18 pillow cover, there are a few factors to consider. These include:

Material and Style of Pillow Cover

The material and style of your pillow cover should be one of the key factors to consider when selecting pillow inserts. Different fabrics and designs require specific types of inserts to maintain the integrity of the cover. For example, if you have a delicate cover with intricate embroidery or beading, a softer insert may be more suitable to prevent any damage to the cover. On the other hand, if you have a cover made of sturdy material, a firmer insert can help maintain its shape and provide better support.

Desired Fullness and Plumpness

The level of fullness and plumpness you desire for your pillows is another important factor to consider when choosing the right insert size. Some people prefer a firm and structured look, while others prefer a softer and more relaxed appearance. If you want your pillows to have a fuller and more pronounced shape, opt for a larger insert size. Conversely, if you prefer a softer and less rigid look, a slightly smaller insert may be the better choice.

Personal Preference

Ultimately, your personal preference should play a significant role in determining the right pillow insert size. Consider your own comfort and style preferences when selecting the insert. Think about how you want the pillows to feel when you lean against them or cuddle up with them. If you enjoy firmer support, go for a larger insert. If you prefer a softer and more huggable pillow, opt for a slightly smaller insert. Your personal preference will ensure that you find the perfect balance between comfort and aesthetics.

Customization and Adjustability

Another factor to consider is whether you want the option to customize or adjust the firmness of your pillows. Some inserts come with a zipper or an opening that allows you to add or remove filling as needed. This feature is particularly useful if you prefer to have control over the level of firmness and want the ability to customize it to your liking. Adjustable inserts provide versatility and flexibility, allowing you to adapt your pillows to different seating positions or personal comfort preferences.


Lastly, it’s important to consider your budget when selecting pillow inserts. The price of inserts can vary depending on the size, material, and quality. It’s worth investing in high-quality inserts that offer durability and long-lasting support, but make sure to choose within your budget. Consider the overall cost and value of the inserts, taking into account their expected lifespan and the level of comfort they provide.

Common Pillow Insert Sizes

Before delving into the specific recommendations for an 18×18 pillow cover, let’s explore the common pillow insert sizes available in the market. These sizes vary to accommodate different pillow cover dimensions. The most common sizes include:

  • 16×16 inches
  • 18×18 inches
  • 20×20 inches
  • 22×22 inches
  • 24×24 inches

These sizes provide a range of options for various pillow cover dimensions, ensuring you can find the perfect fit.

How To Measure And Choose The Correct Pillow Insert

Measuring and choosing the correct pillow insert is essential to ensure a proper fit and achieve the desired look for your pillows. Follow these simple steps to measure and select the right insert size:

  1. Measure the Pillow Cover: Lay your pillow cover flat on a surface and use a tape measure to determine its dimensions. Measure the width and height from seam to seam. Note down the measurements in inches.
  2. Choose the Insert Size: Once you have the measurements of your pillow cover, select an insert size that is slightly larger than the cover dimensions. This ensures a snug and full appearance. For example, if your pillow cover measures 18×18 inches, a 20×20 inch insert would be appropriate.
  3. Consider Fullness: If you prefer a plumper look for your pillows, you can choose an insert that is even larger than the pillow cover. For a more relaxed and softer appearance, opt for an insert that is slightly smaller. Keep in mind your personal preference and the desired aesthetic.
  4. Check the Pillow Insert Packaging: When purchasing pillow inserts, check the packaging or product description for the recommended cover size. Most inserts will indicate the corresponding cover dimensions they are designed to fit. This information can serve as a helpful guide when selecting the right insert size.
  5. Consider Shape: In addition to size, consider the shape of the insert. Pillow inserts come in various shapes, including square, rectangular, round, or bolster. Choose a shape that complements your pillow cover and achieves the desired look.
  6. Test the Insert: Before finalizing your choice, it’s a good idea to place the insert inside the cover and check how it fits. Ensure that the insert fills out the corners and provides a plump appearance without being too tight or loose.

By following these steps, you can measure and choose the correct pillow insert size that will result in a well-filled, comfortable, and visually appealing pillow. Taking the time to select the appropriate insert ensures that your pillows look their best and provide the desired level of comfort and support.

Benefits Of Using The Right Pillow Insert Size

Using the right pillow insert size offers several benefits that contribute to both the visual appeal and comfort of your pillows. Here are the key benefits of selecting the correct pillow insert size:

Enhanced Visual Appeal: 

Choosing the right insert size ensures that your pillows look visually pleasing and well-filled. An appropriately sized insert fills out the pillow cover, creating a plump and inviting appearance. This adds a touch of elegance and sophistication to your living space, elevating the overall aesthetic appeal of your pillows and the room.

Optimal Comfort and Support: 

The correct insert size provides optimal comfort and support for your pillows. A well-filled pillow offers the right level of firmness, allowing you to relax and enjoy a comfortable seating or resting experience. It ensures that your pillows maintain their shape and do not sag or flatten over time, providing consistent support whenever you use them.

Proper Alignment for Posture: 

When you use the right insert size, it helps maintain proper alignment for your posture. Whether you’re sitting or lying down, a well-supported pillow keeps your head, neck, and spine properly aligned, reducing the risk of discomfort, stiffness, or strain. This is particularly important for individuals who have specific neck or back concerns.

Longevity and Durability: 

Using the correct insert size helps maintain the longevity and durability of both the insert and the pillow cover. An ill-fitting insert can cause excess strain on the cover, leading to fraying, stretching, or tearing. By selecting the appropriate size, you ensure that the insert fits snugly within the cover, reducing the risk of damage and extending the lifespan of your pillows.

Versatility and Flexibility:

With the right insert size, your pillows become more versatile and flexible. You can easily swap out different pillow covers without worrying about finding a specific insert for each one. By having a range of appropriately sized inserts, you can mix and match covers, changing the look of your pillows to suit different seasons, styles, or moods.

By using the right pillow insert size, you can enjoy the benefits of enhanced visual appeal, optimal comfort, and support, proper alignment for posture, increased longevity and durability, as well as versatility and flexibility. Investing in appropriately sized inserts ensures that your pillows not only look great but also provide the comfort and functionality you desire. So, make sure to choose the correct insert size to maximize the enjoyment and longevity of your pillows.

Maintaining And Caring For Pillow Inserts

To ensure the longevity of your pillow inserts, it’s essential to follow proper maintenance and care guidelines. Here are a few tips to help you keep your pillow inserts in excellent condition:

  • Regularly fluff and rotate the pillows to prevent uneven wear.
  • Spot clean any stains or spills promptly.
  • Use pillow protectors or covers to provide an extra layer of protection.
  • Air out the inserts occasionally to keep them fresh.


In conclusion, selecting the right pillow insert size is crucial for creating visually appealing and comfortable pillows. By considering factors such as the material and style of the pillow cover, desired fullness and plumpness, personal preferences, customization options, and budget, you can make an informed decision when choosing the insert size.

Choosing the right insert size enhances the overall look and feel of pillows, provides optimal comfort and support, and helps maintain the longevity and durability of both the insert and the pillow cover. Measure and select the right insert size to create inviting and cozy pillows that add charm and comfort to your living space.

Jacob Lindsey

Jacob is a home remodeling guru having worked over 15 years in construction in Reno, NV, mainly focused on home renovations. He likes taking ideas from his clients and making them a reality.

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