---
title: "Door Shims — $200K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/door-shims"
last_updated: "2026-08-09T00:25:23.556Z"
locale: en
meta:
description: "Niche score 41/100 · $200K/yr market · 171K searches/yr · $10.65 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 41/100 · $200K/yr market · 171K searches/yr · $10.65 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Door Shims — $200K/yr Amazon US Niche (2026) - Flapen"
---
# **door shims**
**Skip it**
Soft demand (-17.6% this quarter) — this niche doesn't clear our bar today.
Market size 39Growth 16Conversion 91Competition 19Returns 89Price range 43Avg price 39Brand share 20Review moat 56Quality gap 35
**Conversion**
**Great****11.0%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Great****1.3%**
return rate — above 5% kills the launch gate
**Review moat**
**Good****1,256.54**
avg incumbent reviews — the moat a new listing must climb
**Price range**
**Okay****$5.67–$21.99**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Market size**
**Okay****$200K**
$200K/yr · 171K searches
**Avg price**
**Okay****$10.65**
avg listing price — sweet spot $15–$100
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Bad****92%**
top-5 brand share — brand-locked demand
**Competition**
**Bad****78%**
top-5 click share — a locked-up shelf
**Growth**
**Bad****-17.6%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, door shims is a $200K/yr Amazon United States market (171K searches/yr). The top 5 brands hold 92% of demand. Demand peaks in Feb. Verdict: Skip it — 41/100.
Data updated Jul 27, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **door shims market data**
- **Units sold / yr**
- **20K–25K**
- avg 1,500–2,000/product
- **Revenue / yr**
- **$213K–$266K**
- units × avg price
- **Conversion rate**
- **11.0%**
- **Avg BSR**
- **#364**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **92%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **30 months**
- **Avg seller age**
- **174 days**
## **Competition & brand share**
The top 5 products capture 78% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**8 **▲rising
**Sellers**
**59**
**Top-5 brand share**
**92%**
Top 20: 100%
**Top-5 click share**
**78%**
Top 20: 100%
**Open market**
**5%**
- E-Z Shim44% - LHXZJHYX26% - Nelson Wood Shims11% - QUFA7% - LikeLion4% - AOGROD3% - Open — no brand owns it (2 brands, 5%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -17.6% search growth over the last 90 days.
4K3KHoliday '24Spike '25Spike '26Prime Day '26 seasonSepDecMarJunAugNovMarMay
Peak months: Feb · busiest ÷ quietest = 1.7×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/door-shims/trend)
## **Top door shims search terms**
- **door hinge shims**59K/yr-18.0%8.8% conv. - **door shims**34K/yr-8.9%8.6% conv. - **hinge shims**21K/yr-16.5%9.4% conv. - **door shim**10K/yr-8.8%6.8% conv. - **door hinge shim**9K/yr-21.7%10.3% conv. - **hinge spacers**7K/yr+9.4%3.1% conv. - **hinge shim**6K/yr-23.8%10.3% conv. - **door shims hinge**7K/yr-43.8%9.7% conv. - **door hinge shims 4 inch**6K/yr-26.0%9.6% conv. - **door hinge spacer**5K/yr-30.3%9.7% conv. [**All search terms **](https://flapen.com/research/us/tools-home-improvement/door-shims/search-terms)
## **Top door shims 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%10%$20K20%$40K30%$60K40%$80K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 13 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**E-Z Shim EZ HS350BP 3.5 Hinge Shim 18 count Pack of 1 White**E-Z Shim**$5.67**4.6★4,175 rev](https://www.amazon.com/dp/B001DDAV3O) [2**12pcs Door Hinge Shims 3.5 inch Black Hinge Spacers Hinge shims 3.5 inch**LHXZJHYX**$6.98**4.0★55 rev](https://www.amazon.com/dp/B0GJZVS11B) [3**EZ-Shim HS400BP 4 Hinge Shim (15 Pack)**E-Z Shim**$5.87**4.6★2,387 rev](https://www.amazon.com/dp/B0044V0L8C) [4**Door Hinge Shims Filling Gaps in Interior Doors Adjusting The Spacing to Align Them Used to Solve Problems Such As Door Air Leakage Can Be Trimmed 3.5 Inch (10 3.5 Inch Hinge Shims)**QUFA**$7.36**4.4★106 rev](https://www.amazon.com/dp/B0F4XLT12W) [5**Nelson Wood Shims 8 24 Pack - Kiln Dried Wood**Nelson Wood Shims**$7.82**4.8★2,315 rev](https://www.amazon.com/dp/B07C38PL2N)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**AOGROD 15 Pack Door Hinge Shims 4 Inch Door Hinge Spacer Kit Precut Polycarbonate (PC) Black Hinge Shims with DIY Trimmable for Door Alignment & Repair Filling Gaps 1.2mm / 0.05 Thickness**AOGROD**$14.25**3 rev1mo ago](https://www.amazon.com/dp/B0GRH1499Q) [**12pcs Door Hinge Shims 3.5 inch Black Hinge Spacers Hinge shims 3.5 inch**LHXZJHYX**$6.98**55 rev6mo ago](https://www.amazon.com/dp/B0GJZVS11B) [**12pcs Door Hinge Shims 4 inch Black Hinge Spacers Hinge shims 4 inch**LHXZJHYX**$9.97**55 rev6mo ago](https://www.amazon.com/dp/B0GJYJ2SBC) [**14 Pack Door Hinge Shims 4 Inch Door Hinge Spacer Kit Precut Polycarbonate (PC) Hinge Shims with DIY Trimmable for Door Alignment & Repair Filling Gaps Staggered Pattern 1.2mm / 0.05Thickness**HOHNNYREET**$14.85**28 rev6mo ago](https://www.amazon.com/dp/B0GD7CPS66) [**Door Hinge Shims Filling Gaps in Interior Doors Adjusting The Spacing to Align Them Used to Solve Problems Such As Door Air Leakage Can Be Trimmed 3.5 Inch (10 3.5 Inch Hinge Shims)**QUFA**$7.36**106 rev1y ago](https://www.amazon.com/dp/B0F4XLT12W)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**AOGROD 15 Pack Door Hinge Shims 4 Inch Door Hinge Spacer Kit Precut Polycarbonate (PC) Black Hinge Shims with DIY Trimmable for Door Alignment & Repair Filling Gaps 1.2mm / 0.05 Thickness**AOGROD**$14.25**5.0★**▲ 294%**](https://www.amazon.com/dp/B0GRH1499Q) [**12pcs Door Hinge Shims 3.5 inch Black Hinge Spacers Hinge shims 3.5 inch**LHXZJHYX**$6.98**4.0★**▲ 250%**](https://www.amazon.com/dp/B0GJZVS11B) [**14 Pack Door Hinge Shims 4 Inch Door Hinge Spacer Kit Precut Polycarbonate (PC) Hinge Shims with DIY Trimmable for Door Alignment & Repair Filling Gaps Staggered Pattern 1.2mm / 0.05Thickness**HOHNNYREET**$14.85**4.9★**▲ 202%**](https://www.amazon.com/dp/B0GD7CPS66) [**12pcs Door Hinge Shims 4 inch Black Hinge Spacers Hinge shims 4 inch**LHXZJHYX**$9.97**4.0★**▲ 192%**](https://www.amazon.com/dp/B0GJYJ2SBC) [**Nelson Wood Shims - 8-Inch Wood Shims for Leveling Pro Pack 120 Count Wedges for Toilets Tables Doors & Furniture Levelers for Uneven Floors**Nelson Wood Shims**$21.99**4.6★**— 5%**](https://www.amazon.com/dp/B003TP1ITU)
**~~View all trending →~~**
## **What buyers say about door shims**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Advertised Vs Actual Product**20%
*“Works as advertised”*
**Ease Of Use**18%
*“Easy use”*
**Quality-Overall**15%
*“were much better quality than some of the cheaper bundles Ive bought before”*
**Efficiency**7%
*“Worked for me”*
**Size-Overall**5%
*“Exact fit”*
**Value For Money**5%
*“Money saver”*
**Thickness**5%
*“The thickness is consistent across the pieces”*
**Assembly/Installation**4%
*“Very easy to install”*
**Locking Mechanism**4%
*“Door shuts easy now”*
**Strength**2%
*“Solid shims”*
### **What buyers complain about **
**Size-Overall**15%
*“To big”*
**Quality-Overall**13%
*“Terrible quality control”*
**Thickness**9%
*“A little thinner that I was expecting”*
**Assembly/Installation**7%
*“not for installing pre-hung doors”*
**Functionality-Overall**6%
*“Didn't work for me”*
**Locking Mechanism**6%
*“The door was sagging a bit which caused issues with sealing and latching”*
**Maintenance And Repair**5%
*“Cheap fix”*
**Material Quality**4%
*“They are plastic”*
**Value For Money**4%
*“Overpriced,”*
**Advertised Vs Actual Product**4%
*“Pattern on the product I received was different than what was pictures”*
### **Top return reasons **
**Size-Overall**47%
**Value For Money**11%
**Functionality-Overall**10%
**Advertised Vs Actual Product**9%
**Thin**5%
**Defective Material/Parts**4%
**Compatibility-Overall**3%
**Material Quality**3%
**Quality-Overall**2%
**Thickness**2%
## **Common questions**
- **Is door shims profitable to sell on Amazon United States?**
- The niche generates $200K/yr across 13 tracked products. 0 of 4 products launched in the last 360 days are still selling. 90-day search growth is -17.6%. Flapen's verdict: Skip it (41/100).
- **How competitive is the door shims niche?**
- 8 brands and 59 sellers compete. The top 5 products take 78% of clicks and top 5 brands hold 92% of demand.
- **What do buyers complain about in door shims?**
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Thickness. The return rate is 1.3%.
- **When does demand for door shims peak?**
- Demand peaks in Feb; the busiest month runs 1.7× the quietest.
- **What does it cost to enter the door shims niche?**
- Listings span $5.67–$21.99; the average listing price is $10.65 (sweet spot $15–$100). The average incumbent carries 1,257 reviews — the moat a new listing must climb.
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