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15x21 frame

Skip it

Soft demand (-12.0% this quarter) — this niche doesn't clear our bar today.

Market size 31Growth 19Conversion 78Competition 32Returns 50Price range 95Avg price 95Brand share 36Review moat 24Quality gap 42

Avg price

Incredible$25.83

avg listing price — sweet spot $15–$100

Price range

Incredible$18.27–$40.06

cheapest to priciest tracked listing — scored on the share inside $15–$100

Conversion

Great7.6%

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

Returns

Okay3.0%

return rate — above 5% kills the launch gate

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Brand share

Okay84%

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

Competition

Okay66%

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

Market size

Okay$142K

$142K/yr · 72K searches

Review moat

Bad5,905

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-12.0%

90-day search growth — must beat 0% to launch

According to Flapen's Amazon United States niche tracking, 15x21 frame is a $142K/yr Amazon United States market (72K searches/yr). The top 5 brands hold 84% of demand. Demand peaks in Jan–Feb–Dec. Verdict: Skip it — 43/100.

Data updated Aug 2, 2026 · scored weekly · How we score niches

15x21 frame market data

Units sold / yr
5K–6K
avg 100–250/product
Revenue / yr
$129K–$155K
units × avg price
Conversion rate
7.6%
Avg BSR
#364
Page quality
0%
Prime
75%
Sponsored
90%
Out of stock
4.5%
Avg brand age
46 months
Avg seller age
193 days

Competition & brand share

The top 5 products take 66% of clicks — established leaders, but buyers still shop beyond them.

Brands

12 falling

Sellers

18

Top-5 brand share

84%

Top 20: 100%

Top-5 click share

66%

Top 20: 100%

Open market

12%

  • Americanflat28%
  • QOTIB23%
  • LaVie Home17%
  • ArtToFrames9%
  • A PLUS MAX7%
  • JCJMY4%
  • Open — no brand owns it (6 brands, 12%)

Demand & seasonality

Weekly Amazon search volume, last 102 weeks — -12.0% search growth over the last 90 days.
2K2KSpike '24Spike '25Prime Day '25Holiday '25Spike '26SepDecMarJunAugNovMarMay

Peak months: Jan, Feb, Dec · busiest ÷ quietest = 2.4×

Top 15x21 frame search terms

  • 15x21 frame17K/yr
  • 21x15 frame6K/yr
  • 15x21 picture frame10K/yr
  • 15 x 21 frame5K/yr
  • 21x15 puzzle frame6K/yr
  • 15 x 21 picture frame8K/yr
  • 15.5 x 21 frame3K/yr
  • 15x21 puzzle frame8K/yr
  • 21 x 15 frame4K/yr
  • 21x15 picture frame6K/yr
All search terms

Top 15x21 frame 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%$14K20%$28K30%$43K40%$57K1001K10K100K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 20 tracked products in this niche — three views at once, no toggling.

What buyers say about 15x21 frame

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

What buyers love

Frame Quality36%

“Good frame”

Value For Money15%

“Good value for the item”

Size-Overall12%

“Perfect fit”

Quality-Overall10%

“Great Quality”

Fun/Entertainment Experience5%

“Framing puzzles”

Advertised Vs Actual Product5%

“Product as described”

Ease Of Use4%

“Easy to open and close and easy to hang”

Efficiency2%

“Worked out perfectly”

Strength2%

“Nice strong clips”

Assembly/Installation2%

“Super easy to put in and hang up”

What buyers complain about

Frame Quality30%

“the corners of the actual frame broken or chipped”

Durability20%

“Then one broke trying to press in the clips”

Quality-Overall10%

“An incredibly cheap. quality”

Advertised Vs Actual Product10%

“my puzzle description on the box was wrong”

Material Quality7%

“Cheap feeling”

Top return reasons

Frame Quality63%
Size-Overall26%
Defective Material/Parts3%
Advertised Vs Actual Product3%
Value For Money1%
Scratch Resistance1%
Wood Quality1%
Display-Overall0%
Material Quality0%
Color0%

Common questions

Is 15x21 frame profitable to sell on Amazon United States?
The niche generates $142K/yr across 20 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is -12.0%. Flapen's verdict: Skip it (43/100).
How competitive is the 15x21 frame niche?
12 brands and 18 sellers compete. The top 5 products take 66% of clicks and top 5 brands hold 84% of demand.
What do buyers complain about in 15x21 frame?
Top complaints mined from reviews: Frame Quality, Durability, Quality-Overall. The return rate is 3.0%.
When does demand for 15x21 frame peak?
Demand peaks in Jan–Feb–Dec; the busiest month runs 2.4× the quietest.
What does it cost to enter the 15x21 frame niche?
Listings span $18.27–$40.06; the average listing price is $25.83 (sweet spot $15–$100). The average incumbent carries 5,905 reviews — the moat a new listing must climb.