---
title: "Between Bed and Wall Filler — $112K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/between-bed-and-wall-filler"
last_updated: "2026-08-10T00:17:50.198Z"
locale: en
meta:
description: "Niche score 56/100 · $112K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 56/100 · $112K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Between Bed and Wall Filler — $112K/yr Amazon US Niche (2026) - Flapen"
---
# **between bed and wall filler**
**Worth a look**
Shows a sweet-spot price point ($33.34 avg), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 27Growth 19Conversion 29Competition 93Returns 40Price range 88Avg price 95Brand share 87Review moat 47Quality gap 82
**Avg price**
**Incredible****$33.34**
avg listing price — sweet spot $15–$100
**Competition**
**Great****22%**
top-5 click share — an open shelf
**Price range**
**Great****$7.95–$83.63**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Brand share**
**Great****48%**
top-5 brand share — no brand owns this niche
**Quality gap**
**Great****4.2★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Okay****1,809.42**
avg incumbent reviews — the moat a new listing must climb
**Returns**
**Okay****3.8%**
return rate — above 5% kills the launch gate
**Conversion**
**Okay****2.3%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Okay****$112K**
$112K/yr · 146K searches
**Growth**
**Bad****-11.1%**
90-day search growth — must beat 0% to launch
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=us&signal=no_dominant_brand "Top brand's click share < 20%")
According to Flapen's Amazon United States niche tracking, between bed and wall filler is a $112K/yr Amazon United States market (146K searches/yr). The top 5 brands hold 48% of demand. Demand peaks in Jan–Aug. Verdict: Worth a look — 56/100.
Data updated Jul 14, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **between bed and wall filler market data**
- **Units sold / yr**
- **3K–3K**
- avg 0–100/product
- **Revenue / yr**
- **$83K–$100K**
- units × avg price
- **Conversion rate**
- **2.3%**
- **Avg BSR**
- **#88**
- **Page quality**
- **0%**
- **Prime**
- **99%**
- **Sponsored**
- **89%**
- **Out of stock**
- **9.0%**
- **Avg brand age**
- **28 months**
- **Avg seller age**
- **160 days**
## **Competition & brand share**
Clicks spread well past the top 5 (22% combined) — an open shelf where new products get seen.
**Brands**
**36 **▼falling
**Sellers**
**45**
**Top-5 brand share**
**48%**
Top 20: 88%
**Top-5 click share**
**22%**
Top 20: 57%
**Open market**
**48%**
- DEEPSHARK17% - Vekkia14% - Barpoullar7% - HOMBYS6% - M Mute Touch5% - XetraDesign4%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -11.1% search growth over the last 90 days.
5K3KSpike '24Holiday '24Spike '25Prime Day '25Spike '26Prime Day '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, Aug · busiest ÷ quietest = 1.7×
[**Open Trend **](https://flapen.com/research/us/health-household/between-bed-and-wall-filler/trend)
## **Top between bed and wall filler search terms**
- **mattress gap filler king bed**30K/yr-23.5%1.8% conv. - **bed gap filler twin**23K/yr-4.9%1.3% conv. - **bed gap filler side wall**10K/yr-15.4%0.9% conv. - **twin bed gap filler**9K/yr+11.0%2.4% conv. - **crib gap filler**6K/yr-3.2%1.3% conv. - **mattress gap filler twin**6K/yr-0.5%1.6% conv. - **twin bed wedge gap filler**6K/yr+11.3%2.6% conv. - **mattress gap filler full**6K/yr+0.2%1.2% conv. - **mattress filler**5K/yr+1.7%0.9% conv. - **bed gap filler california king**5K/yr-14.3%0.5% conv. [**All search terms **](https://flapen.com/research/us/health-household/between-bed-and-wall-filler/search-terms)
## **Top between bed and wall filler 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.
0%2%$2K4%$4K6%$7K8%$9K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**DEEPSHARK Mattress Gap Filler Bed Gap Filler for Twin Mattress Extension for Headboard Seams Bed Space Cracks White(3946 Twin/XL)**DEEPSHARK**$28.69**4.4★350 rev](https://www.amazon.com/dp/B0CLJB3T1J) [2**Bedluxe King Wedge Pillow Headboard (76x10x6) Bed Wedge Pillow for Headboard Foam Headboard Pillow Bed Gap Filler King - Fill The Gap (0-7) Mattress Gap Filler (White)**Bedluxe**$24.25**4.5★1,605 rev](https://www.amazon.com/dp/B0CGD2HS9N) [3**DEEPSHARK Mattress Gap Filler Bed Gap Filler for King Mattress Gap Filler Mattress Extension Filler for Headboard Seams Bed Space Space Cracks White(78412 King)**DEEPSHARK**$52.21**4.4★350 rev](https://www.amazon.com/dp/B0CLJ7YTF9) [4**YENING Baby Bed Bumpers for Toddlers Foam Bed Guard Rail for Kids Bed Toddler Bed Bumper for Twin Full Queen King Size Bed Grey 1-Pack**YENING**$20.56**4.7★1,381 rev](https://www.amazon.com/dp/B0BQM3LZ6F) [5**Voctriam Bed Wedge Gap Filler King (76x 8x 6) Wedge Pillow for Headboard Gap 0-8 Mattress Gap Filler Pillow to Fill The Gap Between Mattress and Wall with 2 Side Large Pockets**Voctriam**$38.79**4.2★365 rev](https://www.amazon.com/dp/B0CPSNDKL9)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Barpoullar 79x2x12 Inch Headboard Gap Filler with Foam Space Filler Between Bed and Wall Bolster Pillow Bed Gap Filler Beige**Barpoullar**$48.65**27 rev5mo ago](https://www.amazon.com/dp/B0GM4CKYH1) [**Couzssyhi Bed Wedge Gap Filler King Size Wedge Pillow for Headboard Gap Foldable Mattress Gap Filler Close The Gap (07) Between Headboard and Mattress Bed Crack Pillow 76106 in White**Couzssyhi**$37.74**121 rev8mo ago](https://www.amazon.com/dp/B0G1YKTB7C) [**Headboard Bed Gap Filler High Density Foam Mattress Extender Pillow Removable White 39x2x6**Generic**$19.70**23 rev10mo ago](https://www.amazon.com/dp/B0FR46JXGD) [**EUHAMS Twin Size Bed Wedge Pillow for Headboard Bed Gap Filller/Mattress Gap Filler (0-7) - Wedge Pillow Headboard Triangle Foam Pillows Wedges Between Headboards Mattress (Grey 39x10x6)**EUHAMS**$21.51**815 rev1y ago](https://www.amazon.com/dp/B0F8BLXXJM) [**Vekkia Twin Size Bed Wedge Pillow for Headboard/Bed Wedge Gap Filler/Mattress Gap Filler/Wedge Pillow to Close The Gap (0-6) Between Your Headboard and Mattress (39x10x7)**Vekkia**$22.78**1,901 rev1y ago](https://www.amazon.com/dp/B0F323ZFD3)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Barpoullar 79x2x12 Inch Headboard Gap Filler with Foam Space Filler Between Bed and Wall Bolster Pillow Bed Gap Filler Beige**Barpoullar**$48.65**4.6★**▲ 298%**](https://www.amazon.com/dp/B0GM4CKYH1) [**Couzssyhi Bed Wedge Gap Filler King Size Wedge Pillow for Headboard Gap Foldable Mattress Gap Filler Close The Gap (07) Between Headboard and Mattress Bed Crack Pillow 76106 in White**Couzssyhi**$37.74**4.3★**▲ 188%**](https://www.amazon.com/dp/B0G1YKTB7C) [**Barpoullar Bed Gap Filler for Headboard Space Filler Bed Crack Pillow Stopper Wall Side Mattress Extender Memory Foam Mattress Gap Filler Twin Bed 39x4x6 Inches**Barpoullar**$28.08**4.6★**▲ 86%**](https://www.amazon.com/dp/B0CJBSJCLV) [**Headboard Bed Gap Filler High Density Foam Mattress Extender Pillow Removable White 39x2x6**Generic**$19.70**3.8★**▲ 81%**](https://www.amazon.com/dp/B0FR46JXGD) [**FOUXTEL 4 Modes Pillow Wedge for Headboard Gap Foldable Bed Wedge Pillow Bed Gap Filler King Size Fill The Gap (0-7) Mattress Gap Filler Long Pillow Between Headboard and Mattress**FOUXTEL**$40.94**4.2★**▲ 48%**](https://www.amazon.com/dp/B0DZ6R4H34)
**~~View all trending →~~**
## **What buyers say about between bed and wall filler**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**17%
*“Fit perfect”*
**Advertised Vs Actual Product**10%
*“As advertised”*
**Quality-Overall**9%
*“Excellent Product”*
**Cushion**7%
*“The cushion is strong yet comfy”*
**Comfort-Overall**7%
*“Comfortable and supportive”*
**Value For Money**5%
*“Good deal”*
**Efficiency**5%
*“Works well for intended purpose”*
**Sleep Quality**4%
*“I found the perfect way to achieve a comfortable night sleep”*
**Soft Feel**3%
*“Soft and comfortable”*
**Ease Of Use**3%
*“Easy to use”*
### **What buyers complain about **
**Size-Overall**15%
*“Too small”*
**Quality-Overall**8%
*“Extremely poor quality”*
**Functionality-Overall**6%
*“Did not work as I had hoped”*
**Thickness**6%
*“Not thick enough to stay where its supposed to”*
**Advertised Vs Actual Product**5%
*“Incorrect description”*
**Strength**4%
*“Very flimsy”*
**Cushion**4%
*“Foam is weak n does not support the pillows I have on the bed”*
**Value For Money**4%
*“Not worth buying”*
**Comfort-Overall**3%
*“Not as comfortable as it says in the description”*
**Smell**3%
*“Has a bad chemical smell”*
### **Top return reasons **
**Size-Overall**41%
**Advertised Vs Actual Product**8%
**Functionality-Overall**7%
**Cushion**7%
**Comfort-Overall**4%
**Compatibility-Overall**3%
**Thickness**3%
**Smell**3%
**Defective Material/Parts**2%
**Material Quality**2%
## **Common questions**
- **Is between bed and wall filler profitable to sell on Amazon United States?**
- The niche generates $112K/yr across 76 tracked products. 3 of 9 products launched in the last 360 days are still selling. 90-day search growth is -11.1%. Flapen's verdict: Worth a look (56/100).
- **How competitive is the between bed and wall filler niche?**
- 36 brands and 45 sellers compete. The top 5 products take 22% of clicks and top 5 brands hold 48% of demand.
- **What do buyers complain about in between bed and wall filler?**
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Functionality-Overall. The return rate is 3.8%.
- **When does demand for between bed and wall filler peak?**
- Demand peaks in Jan–Aug; the busiest month runs 1.7× the quietest.
- **What does it cost to enter the between bed and wall filler niche?**
- Listings span $7.95–$83.63; the average listing price is $33.34 (sweet spot $15–$100). The average incumbent carries 1,809 reviews — the moat a new listing must climb.
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