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.

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.

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

Good627.47

avg incumbent reviews — the moat a new listing must climb

Competition

Good46%

top-5 click share — leaders hold, buyers still browse

Brand share

Good70%

top-5 brand share — brands hold most of the demand

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Returns

Okay3.2%

return rate — above 5% kills the launch gate

Conversion

Bad1.0%

search→purchase rate — share of searches ending in a sale

Market size

Bad$21K

$21K/yr · 36K searches

Signals Trending High Price

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

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

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.

Peak months: Apr, May, Jun · busiest ÷ quietest = 11.7×

Open 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.

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

Arden Outdoor Dining Chair Cushion 21 x 21 Rain-Proof Fade Resistant 21 x 21 Sapphire Blue Leala

Arden Selections$40.204.1★666 rev

Arden Seat Cushion 21 x 21 Rain-Proof Fade Resistant Cushion for Patio Dining Adirondack and Outdoor Chairs Sapphire Blue Leala

Arden Selections$28.444.5★414 rev

AAAAAcessories Outdoor Seat Cushions for Chairs Waterproof Fade-Resistant 21 x 21 x 3 Patio Furniture Replacement Cushions Set of 2 Navy Blue

AAAAAcessories$54.054.6★926 rev

AAAAAcessories Outdoor Seat Cushions for Chairs Fade-Resistant Waterproof Patio Furniture Replacement Cushions 21 x 21 x 3 Set of 2 Khaki Beige

AAAAAcessories$57.954.6★926 rev

YENING 21x21 Memory Foam Outdoor Chair Cushions Waterproof 4 Inch Extra Thick Patio Seat Pads for Furniture Grey Set of 2

YENING$48.894.2★391 rev

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$69.0927 rev

5mo ago

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$72.08130 rev

6mo ago

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$56.90309 rev

8mo ago

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$38.20309 rev

8mo ago

AAAAAcessories Outdoor Seat Cushions for Chairs Waterproof Fade-Resistant 21 x 21 x 3 Patio Furniture Replacement Cushions Set of 2 Navy Blue

AAAAAcessories$54.05926 rev

9mo ago

What buyers say about 21x21 outdoor seat cushions

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall22%

“Well made cover”

Cushion15%

“Excellent chair cushions”

Comfort-Overall13%

“Awesome and comfy”

Size-Overall10%

“Correct size”

Value For Money7%

“Money well spent”

Color4%

“Vibrant Color”

Advertised Vs Actual Product4%

“As advertised”

Water Resistance3%

“the waterproofing holds up well”

Material Quality3%

“Very good material for the outdoors”

Durability3%

“Super durable”

What buyers complain about

Cushion19%

“but need more cushion”

Quality-Overall8%

“cheap quality”

Thickness6%

“They reinstated to 1.5 thick”

Advertised Vs Actual Product6%

“THAT IS NOT TRUE”

Color Fading/Discoloration6%

“Faded quickly”

Size-Overall6%

“Not the correct size”

Color5%

“Color a little light”

Value For Money4%

“they were not affordable”

Durability4%

“after less than 2 months it rips, not good”

Stitch/Finish/Polish3%

“It must have been poorly stitched”

Top return reasons

Size-Overall34%

Cushion32%

Color13%

Advertised Vs Actual Product5%

Material Quality4%

Quality-Overall2%

Comfort-Overall2%

Thin1%

Value For Money1%

Thickness1%

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.