12x18 pillow insert
Worth a lookShows searches that convert (11.1% search→purchase), but a deep review moat (12,422 avg reviews) keeps it on the watch list.
Conversion
Great11.1%search→purchase rate — share of searches ending in a sale
Avg price
Great$15.82avg listing price — sweet spot $15–$100
Brand share
Good66%top-5 brand share — brands hold most of the demand
Price range
Good$8.09–$28.47cheapest to priciest tracked listing — scored on the share inside $15–$100
Returns
Good2.4%return rate — above 5% kills the launch gate
Competition
Good54%top-5 click share — leaders hold, buyers still browse
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Growth
Okay+10.9%90-day search growth — must beat 0% to launch
Market size
Okay$111K$111K/yr · 63K searches
Review moat
Bad12,422.45avg incumbent reviews — the moat a new listing must climb
According to Flapen's Amazon United States niche tracking, 12x18 pillow insert is a $111K/yr Amazon United States market (63K searches/yr). The top 5 brands hold 66% of demand. Verdict: Worth a look — 52/100.
Data updated Jul 29, 2026 · scored weekly · How we score niches
12x18 pillow insert market data
- Units sold / yr
- 6K–8K
- avg 100–250/product
- Revenue / yr
- $95K–$127K
- units × avg price
- Conversion rate
- 11.1%
- Avg BSR
- #120
- Page quality
- 0%
- Prime
- 93%
- Sponsored
- 66%
- Out of stock
- 4.6%
- Avg brand age
- 54 months
- Avg seller age
- 173 days
Competition & brand share
The top 5 products take 54% of clicks — established leaders, but buyers still shop beyond them.Brands
20 rising
Sellers
24
Top-5 brand share
66%
Top 20: 100%
Top-5 click share
54%
Top 20: 89%
Open market
30%
- MIULEE26%
- Pillowflex12%
- MoonRest12%
- Nestl9%
- Artscope7%
- NATUS WEAVER4%
Demand & seasonality
Weekly Amazon search volume, last 101 weeks — +10.9% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.5×
Top 12x18 pillow insert search terms
- 12x18 pillow insert29K/yr
- 12 x 18 pillow insert12K/yr
- 12x18 pillow9K/yr
- 10x18 pillow insert5K/yr
- 12 x 18 pillow4K/yr
- 18x12 pillow insert4K/yr
Top 12x18 pillow insert 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 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
MIULEE 12x20 Pillow Insert Throw Pillow for Couch Sofa Bed
MIULEE$9.764.5★38,998 rev
MoonRest 12x18 Inch Synthetic Down Alternative Rectangle Pillow Insert Form Stuffer for Sofa Shams Decorative Throw Pillow Cushion and Bed Pillow Stuffing - Hypoallergenic 12X 18
MoonRest$16.244.4★89 rev
Nestl Throw Pillows for Couch 12x18 Pillow Insert Soft Throw Pillow Lightweight 12x18 Pillow Inserts Machine Washable Sofa Pillows White Throw Pillows Premium Throw Pillow Insert 12x18 Set of 2
Nestl$16.884.4★1,119 rev
Pillowflex Synthetic Down Pillow Insert 12x18 in - Karate Chop Pillow
Pillowflex$23.904.7★11,608 rev
Artscope Synthetic Down Lumbar Pillow Insert 12x18 Down Alternative Throw Pillow Insert. Ultra Soft Fluffy Sleeping Pillow with 100% Cotton Cover Decorative Pillows-White.
Artscope$17.574.6★529 rev
Newest
by launch date
Hearth & Harbor 12x18 Pillow Inserts Set of 2 Lumbar Throw Pillow Insert for Bed Sofa & Couch Soft Fluffy & Supportive White Decorative Cushion Insert
Hearth & Harbor$15.735 rev
OKBA Set of 2 Throw Pillow Inserts Hypoallergenic Soft & Firm Cushions with 100% Cotton Cover 12x20 Pillows Filler for Side Sleepers Sofa Bed and Home Decor Indoor Quality Hotel Pillows
OKBA$15.42356 rev
Artscope Synthetic Down Lumbar Pillow Insert 12x18 Down Alternative Throw Pillow Insert. Ultra Soft Fluffy Sleeping Pillow with 100% Cotton Cover Decorative Pillows-White.
Artscope$17.57529 rev
Toddler Pillow with Pillowcase 10x18 My Little Dreamy Pillow (French Gray)
KeaBabies$16.571,811 rev
JIEITIVE Throw Pillow Inserts Hypoallergenic Premium Pillow Stuffer Rectangle Lumbar Pillow for Decorative Pillow Covers Cushion Set of 1-12 x 20 Inches
JIEITIVE$8.22979 rev
Trending
90-day click momentumHearth & Harbor 12x18 Pillow Inserts Set of 2 Lumbar Throw Pillow Insert for Bed Sofa & Couch Soft Fluffy & Supportive White Decorative Cushion Insert
Hearth & Harbor$15.734.5★
Toddler Pillow with Pillowcase 10x18 My Little Dreamy Pillow (French Gray)
KeaBabies$16.574.4★
Artscope Synthetic Down Lumbar Pillow Insert 12x18 Down Alternative Throw Pillow Insert. Ultra Soft Fluffy Sleeping Pillow with 100% Cotton Cover Decorative Pillows-White.
Artscope$17.574.6★
Kimberbell Pillow Forms (1 12 x 18)
Kimberbell$16.214.8★
NTBAY Cotton Toddler Pillows Set of 2 13 x 18 White
NTBAY$19.344.6★
What buyers say about 12x18 pillow insert
What buyers praise and complain about, mined from review topics.What buyers love
“fit my case just right”
“But for decorative cushions works fine”
“Amazing quality”
“Very fluffy and comfortable”
“So comfy”
“The material is surprisingly soft”
“Matched the description”
“Excellent price”
“Easy to pack for a trip”
“Durable and comfortable”
What buyers complain about
“Also you cant find this weird size at any store”
“its just low quality and flat”
“so they dont fully fill the pillow covers”
“It never did fluff up”
“thicker than this pillow”
“Also, the pricing is completely unreasonable for what you actually get”
“A little too soft”
“they were too uncomfortable”
“The name of this item is deceptive”
“Nice pillow just not as soft as I had hoped”
Top return reasons
Common questions
- Is 12x18 pillow insert profitable to sell on Amazon United States?
- The niche generates $111K/yr across 29 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is +10.9%. Flapen's verdict: Worth a look (52/100).
- How competitive is the 12x18 pillow insert niche?
- 20 brands and 24 sellers compete. The top 5 products take 54% of clicks and top 5 brands hold 66% of demand.
- What do buyers complain about in 12x18 pillow insert?
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Cushion. The return rate is 2.4%.
- When does demand for 12x18 pillow insert peak?
- Demand is steady year-round — the busiest month runs 1.5× the quietest.
- What does it cost to enter the 12x18 pillow insert niche?
- Listings span $8.09–$28.47; the average listing price is $15.82 (sweet spot $15–$100). The average incumbent carries 12,422 reviews — the moat a new listing must climb.