16x38 pillow insert
Worth a lookShows a sweet-spot price point ($32.00 avg), but a small market ($75K/yr) keeps it on the watch list.
Avg price
Incredible$32.00avg listing price — sweet spot $15–$100
Price range
Incredible$19.14–$51.76cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Great9.7%search→purchase rate — share of searches ending in a sale
Growth
Great+74.8%90-day search growth — must beat 0% to launch
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Returns
Good3.0%return rate — above 5% kills the launch gate
Review moat
Okay2,539.54avg incumbent reviews — the moat a new listing must climb
Brand share
Okay89%top-5 brand share — brands hold most of the demand
Competition
Bad73%top-5 click share — a locked-up shelf
Market size
Bad$75K$75K/yr · 24K searches
According to Flapen's Amazon United States niche tracking, 16x38 pillow insert is a $75K/yr Amazon United States market (24K searches/yr). The top 5 brands hold 89% of demand. Demand peaks in Oct–Nov. Verdict: Worth a look — 51/100.
Data updated Jul 29, 2026 · scored weekly · How we score niches
16x38 pillow insert market data
- Units sold / yr
- 3K–3K
- avg 100–250/product
- Revenue / yr
- $80K–$96K
- units × avg price
- Conversion rate
- 9.7%
- Avg BSR
- #88
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 85%
- Out of stock
- 2.1%
- Avg brand age
- 50 months
- Avg seller age
- 186 days
Competition & brand share
The top 5 products capture 73% of clicks — a locked-up shelf that new listings rarely crack.Brands
8 falling
Sellers
11
Top-5 brand share
89%
Top 20: 100%
Top-5 click share
73%
Top 20: 100%
Open market
5%
- MoonRest49%
- Pillowflex14%
- MIULEE11%
- Kimberbell8%
- JoraLion7%
- Poly-Fil6%
- Open — no brand owns it (2 brands, 5%)
Demand & seasonality
Weekly Amazon search volume, last 101 weeks — +74.8% search growth over the last 90 days.Peak months: Oct, Nov · busiest ÷ quietest = 5.0×
Top 16x38 pillow insert search terms
- 16x38 lumbar pillow insert8K/yr
- 16x38 pillow insert12K/yr
- 16 x 38 pillow insert4K/yr
Top 16x38 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 13 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
MoonRest 16x38 Inch Synthetic Down Alternative Rectangle Pillow Insert Form Stuffer for Sofa Shams Decorative Throw Pillow Cushion and Bed Pillow Stuffing - Hypoallergenic 16X 38
MoonRest$34.844.3★21 rev
MoonRest Premium Lumbar Polyester 100% Cotton Fabric Filled with 100% Pure Virgin Synthetic Fiberfill Decorative Throw Pillow Insert Stuffer Form for Sofa Couch Cushion Bedroom 16x36
MoonRest$23.544.6★1,786 rev
Pillowflex Synthetic Down Pillow Insert 16x38 in - Karate Chop Pillow
Pillowflex$48.014.7★11,608 rev
Kimberbell 16 x 38 Plush Bench Pillow Insert Premium Throw Pillow Form for Seasonal & Holiday Dcor Vacuum Packed for Storage Ideal for Kimberbell Machine Embroidery Projects
Kimberbell$30.924.6★233 rev
MIULEE 14x36 Inch Synthetic Down Alternative Lumbar Pillow Insert
MIULEE$19.144.7★805 rev
Newest
by launch date
puredown 16x38 Feather Down Pillow Insert Set of 1 Large Lumbar Pillow Inserts for or Bed Cushion Couch Sofa Decorative Long Pillow Insert with Down-Proof Cover
puredown$33.454,130 rev
Oubonun 16x36 Throw Pillow Insert Plush and Supportive Decorative Cushion with 100% Cotton Cover for Couch Sofa Bed Chair Pack of 1
Oubonun$28.4514 rev
MIULEE 14x36 Inch Synthetic Down Alternative Lumbar Pillow Insert
MIULEE$19.14805 rev
JoraLion 16x38 inch Pillow Insert Suitable for 14x36 Covers Ultra Soft Throw Pillow Insert Polypropylene Cotton Form for Couch Sofa Bed Living Room Decor
JoraLion$30.6516 rev
Pillowflex Synthetic Down Pillow Insert 16x36 in - Karate Chop Pillow
Pillowflex$37.1211,608 rev
Trending
90-day click momentumpuredown 16x38 Feather Down Pillow Insert Set of 1 Large Lumbar Pillow Inserts for or Bed Cushion Couch Sofa Decorative Long Pillow Insert with Down-Proof Cover
puredown$33.454.5★
Pillowflex Synthetic Down Pillow Insert 16x36 in - Karate Chop Pillow
Pillowflex$37.124.7★
Oubonun 16x36 Throw Pillow Insert Plush and Supportive Decorative Cushion with 100% Cotton Cover for Couch Sofa Bed Chair Pack of 1
Oubonun$28.454.2★
MIULEE 14x36 Throw Pillow Insert Virgin Microfiber Pillow for Couch Bed
MIULEE$20.814.7★
MIULEE 14x36 Inch Synthetic Down Alternative Lumbar Pillow Insert
MIULEE$19.144.7★
What buyers say about 16x38 pillow insert
What buyers praise and complain about, mined from review topics.What buyers love
“fits the pillow cover nicely”
“Made the perfect addition”
“Full, fluffy, and exactly what my pillow cover needed”
“Full, fluffy, and exactly what my pillow cover needed”
“Great filler pillow”
“very comfortable”
“Soft and great fit for the decorative pillow I got”
“It does the job”
“Great deal”
“Perfect little supportive accent pillow”
What buyers complain about
“Junk”
“Not 14x36”
“Doubling the price”
“Product description is inaccurate”
“However, the middle lacks the same level of filler as the ends and is flimsy”
“It took about a day to fully expand after opening”
Top return reasons
Common questions
- Is 16x38 pillow insert profitable to sell on Amazon United States?
- The niche generates $75K/yr across 13 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is +74.8%. Flapen's verdict: Worth a look (51/100).
- How competitive is the 16x38 pillow insert niche?
- 8 brands and 11 sellers compete. The top 5 products take 73% of clicks and top 5 brands hold 89% of demand.
- What do buyers complain about in 16x38 pillow insert?
- Top complaints mined from reviews: Quality-Overall, Size-Overall, Value For Money. The return rate is 3.0%.
- When does demand for 16x38 pillow insert peak?
- Demand peaks in Oct–Nov; the busiest month runs 5.0× the quietest.
- What does it cost to enter the 16x38 pillow insert niche?
- Listings span $19.14–$51.76; the average listing price is $32.00 (sweet spot $15–$100). The average incumbent carries 2,540 reviews — the moat a new listing must climb.