18x18 pillow inserts
Launch itA $11.0M/yr market growing +8.4% this quarter with returns at 1.5% — clears our launch bar.
Market size
Incredible$11.0M$11.0M/yr · 5.2M searches
Conversion
Incredible12.8%search→purchase rate — share of searches ending in a sale
Returns
Great1.5%return rate — above 5% kills the launch gate
Avg price
Great$16.56avg listing price — sweet spot $15–$100
Price range
Good$7.90–$24.91cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Growth
Okay+8.4%90-day search growth — must beat 0% to launch
Competition
Okay69%top-5 click share — leaders hold, buyers still browse
Brand share
Bad95%top-5 brand share — brand-locked demand
Review moat
Bad26,381.16avg incumbent reviews — the moat a new listing must climb
According to Flapen's Amazon United States niche tracking, 18x18 pillow inserts is a $11.0M/yr Amazon United States market (5.2M searches/yr). The top 5 brands hold 95% of demand. Demand peaks in Nov–Dec. Verdict: Launch it — 56/100.
Data updated Jul 29, 2026 · scored weekly · How we score niches
18x18 pillow inserts market data
- Units sold / yr
- 600K–800K
- avg 30,000–40,000/product
- Revenue / yr
- $9.9M–$13.2M
- units × avg price
- Conversion rate
- 12.8%
- Avg BSR
- #29
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 100%
- Out of stock
- 0.0%
- Avg brand age
- 42 months
- Avg seller age
- 185 days
Competition & brand share
The top 5 products take 69% of clicks — established leaders, but buyers still shop beyond them.Brands
8 flat
Sellers
14
Top-5 brand share
95%
Top 20: 100%
Top-5 click share
69%
Top 20: 100%
Open market
2%
- MIULEE34%
- Utopia Bedding34%
- EDOW17%
- QUBA LINEN8%
- Phantoscope3%
- Amazon Basics3%
- Open — no brand owns it (2 brands, 2%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +8.4% search growth over the last 90 days.Peak months: Nov, Dec · busiest ÷ quietest = 2.0×
Top 18x18 pillow inserts search terms
- 18x18 pillow inserts1.7M/yr
- pillow inserts704K/yr
- throw pillow inserts557K/yr
- 18x18 pillows585K/yr
- 18 x 18 pillow insert365K/yr
- pillow inserts18x18259K/yr
- pillow insert142K/yr
- 18x18 pillow111K/yr
- square pillows104K/yr
- 18x18 throw pillows93K/yr
Top 18x18 pillow inserts products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 19 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
MIULEE 18x18 Throw Pillows Inserts 2 Pack Decorative Pillows for Couch Bed
MIULEE$13.534.6★4,072 rev
Utopia Bedding 18x18 Pillow Inserts White Throw Pillows for Couch 2 Pack
Utopia Bedding$16.074.6★217,964 rev
Utopia Bedding Throw Pillows Decorative 18x18 Pillow Inserts Set of 4
Utopia Bedding$23.324.7★126,455 rev
MIULEE 18x18 Pillow Inserts 4 Pack 100% Virgin Fiber Filling Throw Pillows
MIULEE$19.734.7★1,616 rev
EDOW Throw Pillow Insert LightweightSoft Polyester Down Alternative Decorative Pillow Sham Stuffer Machine Washable. (White 18x18)
EDOW$7.904.2★25,514 rev
Newest
by launch date
MIULEE 18x18 Inch Pillow Inserts Pack of 2 with 100% Cotton Cover
MIULEE$14.7561 rev
MIULEE 18x18 Pillows Inserts Pack of 4 Down Alternative Virgin Filling
MIULEE$20.95532 rev
Phantoscope Premium 18x18 Throw Pillow Inserts Ultra-Soft Air Layer Pillow Inserts Down Alternative Decorative Throw Pillows for Couch Bedroom Square Cushion Sham Stuffer Pack of 1
Phantoscope$10.42296 rev
Amazon Basics Square Hypoallergenic Down Alternative Pillow Insert Machine Washable Softness and Support 20 inch 2-Pack
Amazon Basics$17.541,946 rev
Amazon Basics Square Hypoallergenic Pillow Insert Down Alternative Fiberfill Sofa Bed Couch Decorative Stuffer 18 2-Pack
Amazon Basics$14.181,946 rev
Trending
90-day click momentumMIULEE 18x18 Inch Pillow Inserts Pack of 2 with 100% Cotton Cover
MIULEE$14.754.6★
QUBA LINEN 18 x 18 Throw Pillow Insert - Pack of 4 White Down Alternative Pillow Inserts for Decorative Pillow Covers Throw Pillows for Bed Couch Pillows for Living Room (18 x 18 (Pack of 4))
QUBA LINEN$16.874.0★
Phantoscope Premium 18x18 Throw Pillow Inserts Ultra-Soft Air Layer Pillow Inserts Down Alternative Decorative Throw Pillows for Couch Bedroom Square Cushion Sham Stuffer Pack of 1
Phantoscope$10.424.7★
QUBA LINEN 18 x 18 Throw Pillow Insert - Pack of 2 White Down Alternative Pillow Inserts for Decorative Pillow Covers Throw Pillows for Bed Couch Pillows for Living Room (Pack of 2)
QUBA LINEN$11.914.0★
Amazon Basics Square Hypoallergenic Down Alternative Pillow Insert Machine Washable Softness and Support 20 inch 2-Pack
Amazon Basics$17.544.3★
What buyers say about 18x18 pillow inserts
What buyers praise and complain about, mined from review topics.What buyers love
“the excellent quality was consistent across all four”
“Fit perfectly for what I needed”
“Soft and Fluffy”
“Fluffy and Comfy”
“They were perfect for the cushion covers I purchased”
“Great Buy”
“Extremely comfortable”
“As described”
“Quality pillows”
“These pillow inserts are thick, well-filled, and super fluffy”
What buyers complain about
“No fluff”
“not as thick as I thought”
“It is not as good quality as I expected”
“Way to BIG”
“not enough cushion”
“Picture is deceiving”
“Not worth the price”
“Not very sturdy”
“dont keep their shape”
“Zero support”
Top return reasons
Common questions
- Is 18x18 pillow inserts profitable to sell on Amazon United States?
- The niche generates $11.0M/yr across 19 tracked products. 5 of 5 products launched in the last 360 days are still selling. 90-day search growth is +8.4%. Flapen's verdict: Launch it (56/100).
- How competitive is the 18x18 pillow inserts niche?
- 8 brands and 14 sellers compete. The top 5 products take 69% of clicks and top 5 brands hold 95% of demand.
- What do buyers complain about in 18x18 pillow inserts?
- Top complaints mined from reviews: Fluffiness, Thickness, Quality-Overall. The return rate is 1.5%.
- When does demand for 18x18 pillow inserts peak?
- Demand peaks in Nov–Dec; the busiest month runs 2.0× the quietest.
- What does it cost to enter the 18x18 pillow inserts niche?
- Listings span $7.90–$24.91; the average listing price is $16.56 (sweet spot $15–$100). The average incumbent carries 26,381 reviews — the moat a new listing must climb.