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21st Birthday Decorations for Him

21st Birthday Decorations for Him shows low returns (0.6%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Flapen Score

56
Worth a look
Market size 25Growth 24Conversion 79Competition 74Returns 97Price range 0Avg price 22Brand share 89Review moat 76Quality gap 65
This niche Category average

Is 21st Birthday Decorations for Him profitable on Amazon?

According to Flapen's Amazon United Kingdom niche tracking, 21st Birthday Decorations for Him is a £99K/yr Amazon United Kingdom market (154K searches/yr). The top 5 brands hold 46% of demand. Demand peaks in Jan. Verdict: Worth a look — 56/100.

21st Birthday Decorations for Him: the Amazon niche in one read

Everything a seller checks before entering, in three answers.

Is the demand real?

Worth a look. Search demand moved -2.7% over the last 90 days and 8.0% of searches end in a purchase.

£99K

revenue / yr

Units sold / yr13K
Search volume / yr-2.7%154K
Conversion rate8.0%
Avg price£8.08

Who owns the niche?

The top 5 brands hold 46% of demand, so 54% of the market is open.

54%

open market share

Brands · sellers32 · 49
Top-5 product click share41%
Open market54%
Avg brand age21 months

Is there a way in?

Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.4★ — the gap to enter on.

0/100

page quality · 39 products

Sponsored placement95%
New entrants (1y)12· 0 succeeded
Avg rating4.4★
Avg reviews472

Top 21st Birthday Decorations for Him products & what they sell for

Every tracked product — its share of the shelf, its review moat, and what it sells for.

Competition: brands, sellers & click share

The top 5 products take 41% of clicks — established leaders, but buyers still shop beyond them.

£0£4K£8K£12K£16K1101001K10K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

32 falling

Sellers

49

Top-5 brand share

46%

Top 20: 90%

Top-5 click share

41%

Top 20: 82%

Open market

48%

  • Jeasona12%
  • Yontree10%
  • VICTERR9%
  • balloon garland8%
  • Navdrivl7%
  • Hstascoz7%

21st Birthday Decorations for Him demand & seasonality

Weekly search volume, with the niche's key stats alongside.

Volume154KCVR8.0%Products39Brands32Top 5 Brands46%OOS Rate4.3%Rating4.4★Reviews472Avg BSR#383
4K3KSpike '25Spike '26SepDecMarJunAugNovMarMay

Peak months: Jan · busiest ÷ quietest = 1.9×

What reviews say buyers love and hate about 21st Birthday Decorations for Him

What buyers mention most, as a share of all reviews.

What buyers love

91% of reviews
Value For Money28%

GREAT VALUE

Quality-Overall25%

Good quality

Gifting Purpose10%

Excellent gift

Advertised Vs Actual Product8%

did the job

Color7%

Nice colour

What buyers complain about

81% of reviews
Strength18%

flimsy really

Quality-Overall15%

Bad quality

Assembly/Installation15%

need assembling

Value For Money10%

Looked far more expensive than they were

Color5%

Colour wasn't as expected

21st Birthday Decorations for Him return rate & reasons

Why buyers send it back, as a share of all return requests.

0.6%

Return rate

49%

Fixable by listing

The "fixable" share counts expectation-mismatch reasons — size, look, advertised-vs-actual — that better copy and images address.

1Color
28%
2Quality-Overall
19%
3Size-Overall
14%
4Strength
8%
5Value For Money
6%

Common 21st Birthday Decorations for Him questions

The questions sellers ask about this niche, answered from the tracked metrics.

Flapen scores 21st Birthday Decorations for Him 56/100 on Amazon United Kingdom — Worth a look. The niche generates £99K/yr across 39 tracked products. 0 of 12 products launched in the last 360 days are still selling. Search demand moved -2.7% over the last 90 days.
Search demand for 21st Birthday Decorations for Him on Amazon United Kingdom peaks in Jan, where the busiest month runs 1.9× the quietest.