Is 21x28 frame profitable to sell on Amazon United States?

The niche generates $67K/yr across 16 tracked products. 0 of 9 products launched in the last 360 days are still selling. 90-day search growth is -2.5%. Flapen's verdict: Skip it (43/100).

How competitive is the 21x28 frame niche?

12 brands and 15 sellers compete. The top 5 products take 68% of clicks and top 5 brands hold 80% of demand.

What do buyers complain about in 21x28 frame?

Top complaints mined from reviews: Frame Quality, Quality-Overall, Durability. The return rate is 2.6%.

When does demand for 21x28 frame peak?

Demand peaks in Jul; the busiest month runs 1.7× the quietest.

What does it cost to enter the 21x28 frame niche?

Listings span $25.93–$54.52; the average listing price is $33.99 (sweet spot $15–$100). The average incumbent carries 4,889 reviews — the moat a new listing must climb.

21x28 frame

Skip it

A small market ($67K/yr) — this niche doesn't clear our bar today.

Avg price

Incredible$33.99

avg listing price — sweet spot $15–$100

Price range

Incredible$25.93–$54.52

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

Conversion

Good5.2%

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

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Returns

Good2.6%

return rate — above 5% kills the launch gate

Brand share

Okay80%

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

Competition

Okay68%

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

Review moat

Bad4,888.63

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-2.5%

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

Market size

Bad$67K

$67K/yr · 38K searches

According to Flapen's Amazon United States niche tracking, 21x28 frame is a $67K/yr Amazon United States market (38K searches/yr). The top 5 brands hold 80% of demand. Demand peaks in Jul. Verdict: Skip it — 43/100.

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

21x28 frame market data

Units sold / yr: 3K–3K; avg 100–250/product
Revenue / yr: $85K–$102K; units × avg price
Conversion rate: 5.2%
Avg BSR: #301
Page quality: 0%
Prime: 88%
Sponsored: 75%
Out of stock: 5.5%
Avg brand age: 39 months
Avg seller age: 211 days

Competition & brand share

The top 5 products take 68% of clicks — established leaders, but buyers still shop beyond them.

Brands

12 rising

Sellers

Top-5 brand share

80%

Top 20: 100%

Top-5 click share

68%

Top 20: 100%

Open market

16%

A PLUS MAX24%
JCJMY21%
LaVie Home21%
Americanflat9%
NAOKBOEE6%
Fxojyvo4%
Open — no brand owns it (6 brands, 16%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -2.5% search growth over the last 90 days.

Peak months: Jul · busiest ÷ quietest = 1.7×

Open Trend

Top 21x28 frame search terms

21x28 frame16K/yr +11.7%4.5% conv.
21 x 28 frame6K/yr -0.8%5.2% conv.
21x28 poster frame5K/yr -3.3%6.5% conv.
28x21 frame5K/yr -4.0%5.4% conv.
28x21 puzzle frame3K/yr -27.5%7.9% conv.
21x28 picture frame3K/yr -38.3%5.7% conv.

All search terms

Top 21x28 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 16 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

A PLUS MAX 21x28 Picture Frame Black Light Weight Wall Mount

A PLUS MAX$26.664.3★5,940 rev

LaVie Home 21x28 Picture Frame for Wall Display 21x28 Black Picture Frame with HD Plexiglas 21 x 28 Poster Frame 1 Pack Display Frame for Vertical or Horizontal Classic Collection

LaVie Home$28.184.4★6,741 rev

JCJMY 21x28 Picture Frame with 18x24 Mat Display Photo 18x24 with Mat or 21 x 28 Without Mat Wall Hanging Large 21 by 28 Poster Frame with Plexiglass Black

JCJMY$28.114.6★2,138 rev

Americanflat 21x28 Poster Frame - Engineered Wood - Black

Americanflat$34.654.5★41,054 rev

NAOKBOEE 21x28 Picture Frame in Black Photo Frames with Plexiglass Horizontal and Vertical Formats for Wall Mounting

NAOKBOEE$25.934.5★1,179 rev

Newest

by launch date

A PLUS MAX 21x28 Picture Frame Brown Light Weight Wall Mount

A PLUS MAX$29.765,940 rev

3mo ago

GULETHUN 21x28 Frame Transitional Modern Design Picture Frames 21 by 28 Rustic Poster Frame for Home Decor Gold Vintage Photo Frame Horizontal or Vertical Display Choose Size & Color

GULETHUN$54.5211 rev

5mo ago

HUKONHEP 21x28 Black Picture Frames Photos Frame with Plexiglass Wall Gallery Photo Frames Horizontal and Vertical for Wall Mounting Home Office Decoration

HUKONHEP$27.912,338 rev

7mo ago

JCJMY 21x28 Picture Frame with 18x24 Mat Display Photo 18x24 with Mat or 21 x 28 Without Mat Wall Hanging Large 21 by 28 Poster Frame with Plexiglass Black

JCJMY$28.112,138 rev

10mo ago

JCJMY 21x28 Picture Frame with 18x24 Mat Display Photo 18x24 with Mat or 21 x 28 Without Mat Wall Hanging Large 21 by 28 Poster Frame with Plexiglass Gold

JCJMY$31.172,138 rev

10mo ago

What buyers say about 21x28 frame

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

What buyers love

Frame Quality38%

“Good frame”

Value For Money17%

“Pretty good for price”

Quality-Overall11%

“Great quality”

Size-Overall6%

“Perfect fit”

Advertised Vs Actual Product4%

“Exactly what I needed”

Efficiency4%

“It does the job”

Assembly/Installation1%

“Installation was simple”

Strength1%

“The frame feels sturdy”

Locking Mechanism1%

“The backing opens easily”

Security1%

“One thing I really like is that the plexiglass is shatter-resistant, which is great if you have kids, pets, or just want something safer than glass”

What buyers complain about

Frame Quality23%

“My puzzle pieces are bowing inside of the frame”

Quality-Overall21%

“Too expressive for cheap quality”

Durability10%

“Broke like a pretzel”

Thickness6%

“It is much thinner than we expected”

Strength6%

“its fragile and definitely not worth the money”

Size-Overall6%

“Dimensions are off”

Value For Money6%

“for the price it feels cheap”

Top return reasons

Frame Quality56%

Size-Overall23%

Advertised Vs Actual Product3%

Defective Material/Parts3%

Quality-Overall3%

Value For Money2%

Color2%

Material Quality1%

Functionality-Overall1%

Product Condition1%

Common questions

Is 21x28 frame profitable to sell on Amazon United States?: The niche generates $67K/yr across 16 tracked products. 0 of 9 products launched in the last 360 days are still selling. 90-day search growth is -2.5%. Flapen's verdict: Skip it (43/100).
How competitive is the 21x28 frame niche?: 12 brands and 15 sellers compete. The top 5 products take 68% of clicks and top 5 brands hold 80% of demand.
What do buyers complain about in 21x28 frame?: Top complaints mined from reviews: Frame Quality, Quality-Overall, Durability. The return rate is 2.6%.
When does demand for 21x28 frame peak?: Demand peaks in Jul; the busiest month runs 1.7× the quietest.
What does it cost to enter the 21x28 frame niche?: Listings span $25.93–$54.52; the average listing price is $33.99 (sweet spot $15–$100). The average incumbent carries 4,889 reviews — the moat a new listing must climb.