Decorative pillows may look effortless, but the secret to that full, polished, designer look is choosing the right pillow insert. The wrong-size insert can make even the most beautiful pillow cover look flat or sloppy.
At Primoends – Home Decor to Go, we’re sharing a simple, no-guesswork guide to help you choose the perfect pillow insert size, the right fill type, and how to achieve that coveted karate-chop pillow look.
Why Pillow Insert Size Matters
Pillow inserts are the foundation of decorative pillows. The size and fill affect:
- How full your pillow looks
- How well it holds its shape
- Comfort and support
- Whether it looks styled or saggy
Interior designers almost always recommend sizing up when it comes to decorative pillows.
The Golden Rule: Always Size Up Your Pillow Insert
For most decorative pillows, follow this simple rule:
Choose a pillow insert that is 2 inches larger than your pillow cover.
This creates a plump, structured pillow that fills out the corners and instantly looks more high-end.
Pillow Insert Size Chart
Use this guide when shopping for inserts:
- 20×20 pillow cover → 22×22 pillow insert
- 18×18 pillow cover → 20×20 pillow insert
- 16×16 pillow cover → 18×18 pillow insert
- 14×14 or smaller → Same-size insert recommended
👉 Pro tip: If you want a firmer, more sculpted look, sizing up is the easiest way to achieve it.
What Is the “Karate-Chop” Pillow Look?
The karate-chop pillow—that subtle crease at the top of a pillow—is a signature of professional styling.
To achieve it, you need:
- A slightly oversized insert
- Enough loft and structure
- The right fill material
Flat inserts = no chop.
Choosing the Right Pillow Insert Fill
Down & Feather Pillow Inserts
Best for decorative styling and luxury feel.
Why choose them:
- Ultra-plush and soft
- Excellent shape retention
- Best for achieving the karate-chop look
- Ideal for sofas, beds, and styled spaces
Keep in mind:
These may require gentle or professional cleaning and may not be ideal for allergy-sensitive homes.
Down Alternative / Polyester Pillow Inserts
Best for everyday living and easy care.
Why choose them:
- Hypoallergenic and allergy-friendly
- Firmer, supportive structure
- Often machine washable
- Durable and budget-friendly
Perfect for family homes, rentals, and high-traffic areas.
Where Pillow Insert Size Makes the Biggest Difference
Living Room
- Use 22×22 inserts for 20×20 covers
- Firmer inserts offer better back support
- Mix sizes for a layered, designer look
Bedroom
- Slightly softer inserts work well
- Down or down-alternative both perform beautifully
- Ideal for accent pillows and euro shams
Benches & Accent Chairs
- Firmer inserts help pillows keep their shape
- Size up to avoid sagging in smaller spaces
Are Pillow Inserts Washable?
Yes—depending on the fill type.
-
Polyester or microfiber inserts:
Machine washable on a delicate cycle -
Down & feather inserts:
Gentle washing recommended; always dry thoroughly to prevent clumping or mildew
Fluff inserts regularly to maintain loft and shape.
Common Pillow Insert Mistakes to Avoid
- Choosing the same size insert as the cover
- Using overly soft inserts for decorative pillows
- Buying sleeping pillows instead of decorative inserts
- Ignoring fill type when shopping
Decorative pillows need structure, not just softness.
Shop Pillow Inserts at Primoends – Home Decor to Go
At Primoends, our pillow inserts are selected to give your decorative pillows a full, professional finish—without the guesswork.
Final Styling Tip
When in doubt, size up. A fuller pillow always looks better than a flat one.
Your space—and your sofa—will thank you.