What Size Pillow for 18×18 Cover? Choosing the Right Fit

Many people find themselves puzzled when it comes to selecting the perfect size pillow for their 18×18 pillow cover. It may seem like a simple task, but choosing the wrong size pillow can result in an unflattering, lumpy appearance or an overstuffed, uncomfortable cushion. In this guide, we will help you navigate the options and make an informed decision on the ideal pillow size for your 18×18 cover to achieve a polished and cozy look for your space.

Key Takeaways:

  • Choose an 18×18 pillow insert: To achieve the best fit for an 18×18 pillow cover, select a pillow insert that matches the size of the cover.
  • Consider a slightly larger insert: Opting for a 20×20 pillow insert can provide a fuller look to your 18×18 pillow cover and prevent it from looking flat.
  • Adjust the firmness of the insert: To customize the feel and look of the pillow, you can choose a soft, medium, or firm insert based on personal preference and intended use.

Understanding Pillow Sizing

To ensure that your 18×18 pillow cover is properly filled and looks visually appealing, it is crucial to choose the right size pillow insert. Understanding pillow sizing will help you make an informed decision when selecting the appropriate insert for your cover.

Dimensions of Pillow Covers

Pillow covers are typically labeled with the dimensions of the pillow they are designed to fit. For an 18×18 pillow cover, you should ideally select an insert that matches the same measurements to ensure a snug and full appearance. Using a larger or smaller insert can result in an improperly filled pillow that looks awkward and unprofessional.

The Importance of Pillow Insert Size

An incorrectly sized pillow insert can affect both the comfort and aesthetics of your pillow. Inserting a pillow that is too small will result in a lumpy and unbalanced look, while using one that is too large can lead to an overstuffed and stiff pillow. It is necessary to choose the correct size insert to achieve the desired plushness and appearance.

Choosing the Perfect Pillow for Your 18×18 Cover

Standard Sizes and Compatibility

Perfect pillow sizes for an 18×18 cover are typically 18×18 or 20×20 inches. These standard sizes ensure a snug and full look when inserted into the cover. While you can opt for a larger size, be cautious as overly large pillows may stretch the cover and cause it to lose its shape.

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Material and Loft Considerations

To select the perfect pillow for your 18×18 cover, consider the material and loft. Choose a high-quality pillow with optimal fill power to provide both comfort and support. A pillow with a medium loft typically works best for most individuals, offering the right balance of softness and height.

Material choice is crucial when it comes to selecting the right pillow for your cover. Opt for hypoallergenic materials if you have allergies, and ensure the pillow cover is made of breathable fabric to promote airflow and keep you cool throughout the night.

Tips for a Flawless Fit

All too often, the key to achieving the perfect look with your 18×18 pillow covers lies in selecting the right pillow insert size. Here are some tips to help you get that flawless fit:

How to Measure for the Best Fit

Tips for measuring your pillow cover include laying it flat and measuring from seam to seam for accurate dimensions. Be sure to consider the fullness you desire, as this will impact the insert size needed for a snug fit.

The Role of Pillow Fill in Achieving Desired Fullness

To ensure your 18×18 pillow cover looks its best, the choice of pillow fill is crucial. Opting for a quality fill that provides ample support and maintains its shape is crucial. A too-soft fill can result in a lackluster appearance, while an overly firm fill can make the pillow appear overstuffed.

Common Questions and Misconceptions

Can I Use a Different Size Insert for My 18×18 Cover?

Questions often arise about whether you can use a different size insert for your 18×18 cover. While it is possible to use a slightly larger or smaller insert, it is generally recommended to stick with an 18×18 insert for the best fit and appearance. Using a smaller insert may result in a saggy or misshapen look, while a larger insert can make the pillow look overstuffed and bulky. For more detailed information on choosing the right insert size, check out our Pillow Insert Size Guide.

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Adjusting for Shrinkage and Fabric Stretch

To address concerns about shrinkage and fabric stretch, it is important to consider these factors when selecting a pillow insert for your 18×18 cover. The fabric of your cover may shrink slightly after washing, so choosing a slightly larger insert can account for this shrinkage and maintain a full appearance. Additionally, some fabrics may stretch over time with use, so opting for a firmer insert can help retain the pillow’s shape over time.

To wrap up

Taking this into account, when choosing the right size pillow for an 18×18 cover, it’s important to consider both the aesthetics and functionality of the pillow. A 20×20 insert will provide a fuller look and ensure the corners are properly filled out, while a 18×18 insert will give a more relaxed and casual appearance. Ultimately, the decision comes down to personal preference and the desired look for your space. By selecting the appropriate pillow size, you can enhance the overall look of your decor and create a cozy, inviting atmosphere in your home.


Q: What size pillow should I use for an 18×18 cover?

A: For an 18×18 pillow cover, it is recommended to use a pillow insert that is the same size, which in this case would be an 18×18 pillow insert. This will ensure a snug and full look for your pillow.

Q: Can I use a larger pillow insert for an 18×18 cover?

A: While it is possible to use a larger pillow insert, such as a 20×20, for an 18×18 cover, it may result in a more overstuffed appearance. This can distort the shape of the pillow cover and impact its overall aesthetic.

Q: What if I use a smaller pillow insert for an 18×18 cover?

A: Using a smaller pillow insert, such as a 16×16, for an 18×18 cover will likely result in a loose and deflated look. The cover may not be fully filled out, causing it to appear wrinkled and unstructured. It is best to stick to the recommended size for the best fit.

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