---
title: "21x21 Outdoor Seat Cushions — $21K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/patio-lawn-garden/21x21-outdoor-seat-cushions"
last_updated: "2026-08-05T18:43:43.633Z"
locale: en
meta:
description: "Niche score 55/100 · $21K/yr market · 36K searches/yr · $55.39 avg price. A small market ($21K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 55/100 · $21K/yr market · 36K searches/yr · $55.39 avg price. A small market ($21K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:title": "21x21 Outdoor Seat Cushions — $21K/yr Amazon US Niche (2026) - Flapen"
---
# **21x21 outdoor seat cushions**
**Worth a look**
Shows demand growing +109.1% this quarter, but a small market ($21K/yr) keeps it on the watch list.
Market size 5Growth 95Conversion 13Competition 66Returns 48Price range 94Avg price 91Brand share 59Review moat 72Quality gap 52
**Growth**
**Great****+109.1%**
90-day search growth — must beat 0% to launch
**Price range**
**Great****$28.44–$101.28**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Avg price**
**Great****$55.39**
avg listing price — sweet spot $15–$100
**Review moat**
**Good****627.47**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Good****46%**
top-5 click share — leaders hold, buyers still browse
**Brand share**
**Good****70%**
top-5 brand share — brands hold most of the demand
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Returns**
**Okay****3.2%**
return rate — above 5% kills the launch gate
**Conversion**
**Bad****1.0%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Bad****$21K**
$21K/yr · 36K searches
**Signals**[** Trending**](https://flapen.com/research/niches?market=us&signal=trending "Search growth > 100% (90d)") [** High Price**](https://flapen.com/research/niches?market=us&signal=high_price "Avg price > $50")
According to Flapen's Amazon United States niche tracking, 21x21 outdoor seat cushions is a $21K/yr Amazon United States market (36K searches/yr). The top 5 brands hold 70% of demand. Demand peaks in Apr–May–Jun. Verdict: Worth a look — 55/100.
Data updated Jul 23, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **21x21 outdoor seat cushions market data**
- **Units sold / yr**
- **500–750**
- avg 0–100/product
- **Revenue / yr**
- **$28K–$42K**
- units × avg price
- **Conversion rate**
- **1.0%**
- **Avg BSR**
- **#306**
- **Page quality**
- **0%**
- **Prime**
- **80%**
- **Sponsored**
- **87%**
- **Out of stock**
- **6.2%**
- **Avg brand age**
- **27 months**
- **Avg seller age**
- **180 days**
## **Competition & brand share**
The top 5 products take 46% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**15 **▼falling
**Sellers**
**21**
**Top-5 brand share**
**70%**
Top 20: 100%
**Top-5 click share**
**46%**
Top 20: 89%
**Open market**
**25%**
- Arden Selections30% - AAAAAcessories14% - BPS13% - Fitfree7% - PatioGlow6% - Aoodor5%
## **Demand & seasonality**
Weekly Amazon search volume, last 63 weeks — +109.1% search growth over the last 90 days.
2K2KSpike '26 seasonJunJulAugSepOctNovDecJanFebMarAprMayJun
Peak months: Apr, May, Jun · busiest ÷ quietest = 11.7×
[**Open Trend **](https://flapen.com/research/us/patio-lawn-garden/21x21-outdoor-seat-cushions/trend)
## **Top 21x21 outdoor seat cushions 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%$2K20%$4K30%$6K40%$8K101001K10K 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**Arden Outdoor Dining Chair Cushion 21 x 21 Rain-Proof Fade Resistant 21 x 21 Sapphire Blue Leala**Arden Selections**$40.20**4.1★666 rev](https://www.amazon.com/dp/B0BHBFNBYM) [2**Arden Seat Cushion 21 x 21 Rain-Proof Fade Resistant Cushion for Patio Dining Adirondack and Outdoor Chairs Sapphire Blue Leala**Arden Selections**$28.44**4.5★414 rev](https://www.amazon.com/dp/B0BHBM6RJZ) [3**AAAAAcessories Outdoor Seat Cushions for Chairs Waterproof Fade-Resistant 21 x 21 x 3 Patio Furniture Replacement Cushions Set of 2 Navy Blue**AAAAAcessories**$54.05**4.6★926 rev](https://www.amazon.com/dp/B0FTW1MQS1) [4**AAAAAcessories Outdoor Seat Cushions for Chairs Fade-Resistant Waterproof Patio Furniture Replacement Cushions 21 x 21 x 3 Set of 2 Khaki Beige**AAAAAcessories**$57.95**4.6★926 rev](https://www.amazon.com/dp/B0FTW23YY3) [5**YENING 21x21 Memory Foam Outdoor Chair Cushions Waterproof 4 Inch Extra Thick Patio Seat Pads for Furniture Grey Set of 2**YENING**$48.89**4.2★391 rev](https://www.amazon.com/dp/B0CWTSL7LQ)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Youyole Outdoor Chair Cushions Set of 4 21 x 21 x 3 Thick Foam D-Shaped Patio Seat Cushions with Ties Waterproof & Fade Resistant Kitchen Chair Pads for Dining Furniture Garden Patio Sofa**Youyole**$69.09**27 rev5mo ago](https://www.amazon.com/dp/B0GLP2Y4M5) [**PatioGlow Outdoor Seat Cushion Set 22 x 22 x 3.5 Set of 2 Water-Resistant & Fadeness Patio Furniture Cushions with Removable Cover & Ties Thick Deep Seating Pads for Outside Sofa Couch Grey**PatioGlow**$72.08**130 rev6mo ago](https://www.amazon.com/dp/B0GJKNT26G) [**Fitfree Outdoor Chair Cushions Water-Resistant & Fade-Resistant Patio Furniture Square Seat Replacement Chair Pads with Ties Removable Cover Non-Slip Bottom Set of 4 22 x 22 Inch Natural**Fitfree**$56.90**309 rev8mo ago](https://www.amazon.com/dp/B0G1S4M4J3) [**Fitfree Outdoor Chair Cushions Water-Resistant & Fade-Resistant Patio Furniture Square Seat Replacement Chair Pads with Ties Removable Cover Non-Slip Bottom Set of 4 19 x 19 Inch Navy Blue**Fitfree**$38.20**309 rev8mo ago](https://www.amazon.com/dp/B0G1S2LLKG) [**AAAAAcessories Outdoor Seat Cushions for Chairs Waterproof Fade-Resistant 21 x 21 x 3 Patio Furniture Replacement Cushions Set of 2 Navy Blue**AAAAAcessories**$54.05**926 rev9mo ago](https://www.amazon.com/dp/B0FTW1MQS1)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**PatioGlow Outdoor Seat Cushion Set 22 x 22 x 3.5 Set of 2 Water-Resistant & Fadeness Patio Furniture Cushions with Removable Cover & Ties Thick Deep Seating Pads for Outside Sofa Couch Grey**PatioGlow**$72.08**4.4★**▲ 67%**](https://www.amazon.com/dp/B0GJKNT26G) [**Fitfree Outdoor Chair Cushions Water-Resistant & Fade-Resistant Patio Furniture Square Seat Replacement Chair Pads with Ties Removable Cover Non-Slip Bottom Set of 4 22 x 22 Inch Natural**Fitfree**$56.90**4.4★**▲ 64%**](https://www.amazon.com/dp/B0G1S4M4J3) [**Youyole Outdoor Chair Cushions Set of 4 21 x 21 x 3 Thick Foam D-Shaped Patio Seat Cushions with Ties Waterproof & Fade Resistant Kitchen Chair Pads for Dining Furniture Garden Patio Sofa**Youyole**$69.09**4.2★**▲ 55%**](https://www.amazon.com/dp/B0GLP2Y4M5) [**LVTXIII Outdoor Low Back Chair Cushions Seasonal Replacement Adirondack Chair Cushion with Ties Patio Waterproof Seat Cushions for Home Garden Use 21 W x 21 D Set of 2 Boho Geometry Blue**LVTXIII**$98.90**4.3★**▲ 47%**](https://www.amazon.com/dp/B0DPLXQPS8) [**QILLOWAY Outdoor Chair Cushion for Patio Furniture Waterproof Patio Cushions with Ties Fade Resistant Replacement Pads for Outdoor Rocking Chairs Tan Grey**QILLOWAY**$37.54**4.1★**▲ 47%**](https://www.amazon.com/dp/B07XKRQ5PJ)
**~~View all trending →~~**
## **What buyers say about 21x21 outdoor seat cushions**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**22%
*“Well made cover”*
**Cushion**15%
*“Excellent chair cushions”*
**Comfort-Overall**13%
*“Awesome and comfy”*
**Size-Overall**10%
*“Correct size”*
**Value For Money**7%
*“Money well spent”*
**Color**4%
*“Vibrant Color”*
**Advertised Vs Actual Product**4%
*“As advertised”*
**Water Resistance**3%
*“the waterproofing holds up well”*
**Material Quality**3%
*“Very good material for the outdoors”*
**Durability**3%
*“Super durable”*
### **What buyers complain about **
**Cushion**19%
*“but need more cushion”*
**Quality-Overall**8%
*“cheap quality”*
**Thickness**6%
*“They reinstated to 1.5 thick”*
**Advertised Vs Actual Product**6%
*“THAT IS NOT TRUE”*
**Color Fading/Discoloration**6%
*“Faded quickly”*
**Size-Overall**6%
*“Not the correct size”*
**Color**5%
*“Color a little light”*
**Value For Money**4%
*“they were not affordable”*
**Durability**4%
*“after less than 2 months it rips, not good”*
**Stitch/Finish/Polish**3%
*“It must have been poorly stitched”*
### **Top return reasons **
**Size-Overall**34%
**Cushion**32%
**Color**13%
**Advertised Vs Actual Product**5%
**Material Quality**4%
**Quality-Overall**2%
**Comfort-Overall**2%
**Thin**1%
**Value For Money**1%
**Thickness**1%
## **Common questions**
- **Is 21x21 outdoor seat cushions profitable to sell on Amazon United States?**
- The niche generates $21K/yr across 30 tracked products. 4 of 8 products launched in the last 360 days are still selling. 90-day search growth is +109.1%. Flapen's verdict: Worth a look (55/100).
- **How competitive is the 21x21 outdoor seat cushions niche?**
- 15 brands and 21 sellers compete. The top 5 products take 46% of clicks and top 5 brands hold 70% of demand.
- **What do buyers complain about in 21x21 outdoor seat cushions?**
- Top complaints mined from reviews: Cushion, Quality-Overall, Thickness. The return rate is 3.2%.
- **When does demand for 21x21 outdoor seat cushions peak?**
- Demand peaks in Apr–May–Jun; the busiest month runs 11.7× the quietest.
- **What does it cost to enter the 21x21 outdoor seat cushions niche?**
- Listings span $28.44–$101.28; the average listing price is $55.39 (sweet spot $15–$100). The average incumbent carries 627 reviews — the moat a new listing must climb.
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