How to Measure a Pillow for a Pillow Cover

Pillow styling can completely transform a room — but only when the pillow cover fits properly. A beautiful design loses its charm if the pillow insert is too small or feels overstuffed. That’s why knowing how to measure a pillow for a pillow cover is important for both comfort and style.

Whether you’re refreshing your couch, decorating your bedroom, or styling a guest room, this simple guide will help ensure your pillow covers fit perfectly every time.

Must Read: Transform Your Home This Holiday Season With Christmas Throw Pillow Covers

Why Pillow Measurements Matter

A correctly sized pillow cover:

• Creates a clean, polished look
  
  

• Makes the pillow feel plush and supportive
  
  

• Helps the insert last longer
  
  

• Ensures the pillow holds its shape and volume
  
  

• Prevents sagging or awkward bulges
  
  

When it comes to décor, the right fit makes a noticeable difference.

Step-by-Step: How to Measure a Pillow

Before you choose a pillow cover, measure the pillow insert using a soft measuring tape. Follow this method for the most accurate results:

1. Lay the Pillow on a Flat Surface

Place the pillow insert on a table or floor. Don’t measure while holding it — that leads to incorrect sizing.

2. Measure from Seam to Seam

Measure the pillow’s height and width from one seam to the opposite seam.

➡ Example: If the pillow measures 18" from top to bottom and 18" from left to right, the pillow size is 18×18 inches.

3. Do Not Measure the Curve or Bulge

Pillows puff out in the middle. Focus on the stitching/edge, not the stuffed center.

4. Round to the Nearest Whole Inch

If your pillow insert is slightly uneven, round to the nearest inch.

Should Pillow Covers Be the Same Size as the Pillow Insert?

Here’s where it gets interesting.

Most designers recommend choosing a pillow cover that is 1–2 inches smaller than the pillow insert.
This gives a fuller, more supportive look.

Size Example

For lumbar pillows, match the width exactly, and go 1” shorter in height for a tailored fit.

The “Designer Look” Formula

To achieve that plush, high-end feel seen in magazines, use this simple formula:

Insert = 2 inches larger than cover

Example:
20×20 inch insert ➜ 18×18 inch cover

This trick adds instant volume and makes the pillow feel more luxurious.

Understanding Pillow Cover Labels

It’s common to find pillow covers labeled by insert size — not the cover’s sewn dimensions.

For example:
A cover that fits an 18×18 insert might actually measure 17×17 inches.

So don’t get confused — the labeling is based on the recommended insert, not the exact cover dimension.

How Sizing Affects Home Décor Style

Different cover sizes achieve different décor results:Mixing shapes and textures — linen, velvet, faux fur, embroidery — makes décor feel curated and personal.

Quick Measuring Checklist

Before ordering pillow covers, ask:

What size is my insert?
Do I want a regular fit or a fuller designer look?
Am I mixing different shapes and sizes for layering?

If you're unsure, you can never go wrong with:

20×20 inserts + 18×18 covers for long-lasting volume and comfort.

Common Mistakes to Avoid

Guessing pillow size instead of measuring
Measuring diagonally
Choosing a larger cover than the insert
Forgetting that fabrics stretch differently

Measuring once saves time, money, and returns.

Getting the Perfect Fit

Knowing how to measure a pillow for a pillow cover helps you get the stylish, cozy, and polished look every space deserves. Always start with the insert measurement, choose a cover 1–2 inches smaller for fullness, and mix sizes for a designer-approved look.

💖 Ready to Style Your Home?

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FAQs About Measuring Pillow Covers

1. How do I know what size pillow cover to buy?
Measure your pillow insert seam-to-seam and choose a cover 1–2 inches smaller for a fuller look.

2. Do pillow covers run true to size?
Yes, but sizing is based on insert size, not actual cover measurement.

3. What if my pillow insert measures between sizes?
Round to the nearest whole inch and follow the cover-1-to-2-inches-smaller rule.

4. Should a pillow cover be tight or loose?
Slightly snug. A tight cover creates a polished, full look without extra gaps or wrinkles.

5. Can I mix different pillow sizes in one space?
Absolutely, layering multiple sizes and textures produces a stylish, curated feel.