Is 21st birthday decorations for him profitable to sell on Amazon United Kingdom?

The niche generates £99K/yr across 39 tracked products. 0 of 12 products launched in the last 360 days are still selling. 90-day search growth is -2.7%. Flapen's verdict: Worth a look (56/100).

How competitive is the 21st birthday decorations for him niche?

32 brands and 49 sellers compete. The top 5 products take 41% of clicks and top 5 brands hold 46% of demand.

What do buyers complain about in 21st birthday decorations for him?

Top complaints mined from reviews: Strength, Quality-Overall, Assembly/Installation. The return rate is 0.6%.

When does demand for 21st birthday decorations for him peak?

Demand peaks in Jan; the busiest month runs 1.9× the quietest.

What does it cost to enter the 21st birthday decorations for him niche?

Listings span £2.66–£14.80; the average listing price is £8.08 (sweet spot $15–$100). The average incumbent carries 472 reviews — the moat a new listing must climb.

21st birthday decorations for him

Worth a look

Shows low returns (0.6%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Returns

Incredible0.6%

return rate — above 5% kills the launch gate

Brand share

Great46%

top-5 brand share — no brand owns this niche

Conversion

Great8.0%

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

Review moat

Great472.36

avg incumbent reviews — the moat a new listing must climb

Competition

Good41%

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

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Market size

Bad£99K

£99K/yr · 154K searches

Growth

Bad-2.7%

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

Avg price

Bad£8.08

avg listing price — sweet spot $15–$100

Price range

Bad£2.66–£14.80

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

Signals No Dominant Brand

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.

Data updated Jul 27, 2026 · scored weekly · How we score niches

21st birthday decorations for him market data

Units sold / yr: 10K–13K; avg 100–250/product
Revenue / yr: £81K–£101K; units × avg price
Conversion rate: 8.0%
Avg BSR: #383
Page quality: 0%
Prime: 97%
Sponsored: 95%
Out of stock: 4.3%
Avg brand age: 21 months
Avg seller age: 194 days

Competition & brand share

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

Brands

32 falling

Sellers

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%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -2.7% search growth over the last 90 days.

Peak months: Jan · busiest ÷ quietest = 1.9×

Open Trend

Top 21st birthday decorations for him 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

Jeasona 21st Birthday Gifts for Men Keepsake Gift for Him 21 Year Old Man Funny Socks Size 9-11

Jeasona£5.724.6★3,293 rev

21st Birthday Decorations for Men - Blue and Gold Banner Balloons Navy and Gold Latex Confetti Party Supplies

VICTERR£7.694.4★1,838 rev

21st Birthday Decorations Set 18Pcs Black Gold Balloons kit with Banners Cake Topper Triangle Flags Black Gold and Sequin Balloons Sash for Men Women Birthday Party Decoration Supplies

balloon garland£7.544.0★248 rev

21st Birthday Decorations for Him 21st Birthday Decorations with Cheer Banner 40Inch Number 21 Foil Balloons 21st Sign Black & Gold Balloons Champagne Cups Foil Balloon Party Decoration for Her

Hstascoz£7.994.6★1,095 rev

21st Birthday Decorations Blue Silver for Boy Men - Party Supplies for Him Banner Bunting Sash Confetti Latex Balloons Triangle Flags Cake Toppers

Yontree£8.114.4★631 rev

Newest

by launch date

21st Birthday Decorations Banner Balloon - 30 Pcs Born In 2005 Uk Vintage Happy 21 Years Old Birthday Background Banners Number 21 Balloons Spiral Hanging Cake Toppper for Boys Girls Party Deco

SEWIRUY£11.678 rev

5mo ago

Black Gold 21st Birthday Balloons - 30pcs Birthday Decorations for Her and Him with Ribbon Twenty-One Latex Balloons for 21 Year Old Party Celebration

Sroeeshee£8.1150 rev

7mo ago

21st Birthday Decorations for Him Gold and Black Birthday Banner with Hanging Swirls Party Decor for 21st Celebrations Party Supplies (Self-assembly)

YTLSDHF£6.473 rev

11mo ago

NICECONE 21st Birthday Gifts for Men - Funny Novelty Socks with It Took 21 Years to Look This Good - Black Calf-Length Birthday Presents for Son Grandson Boyfriend Brother

NICECONE£4.2622 rev

11mo ago

21st Birthday Decorations for Him Her 21st Birthday Banner Backdrop Balloons Black and Gold Happy 21st Bday Decorations for Men Banners Tablecover Triangle Flag 21 Year Old Bday Gift Party Supplies

Navdrivl£12.32111 rev

1y ago

What buyers say about 21st birthday decorations for him

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

What buyers love

Value For Money28%

“GREAT VALUE”

Quality-Overall25%

“Good quality”

Gifting Purpose10%

“Excellent gift”

Advertised Vs Actual Product8%

“did the job”

Color7%

“Nice colour”

Durability4%

“durable”

Design-Overall3%

“Ideal for room decorating good size great colours”

Assembly/Installation3%

“Very easy to assembly”

Size-Overall2%

“They are a good size”

Ease Of Use1%

“it was easy to do”

What buyers complain about

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”

Material Quality5%

“the one banner made out of strange material”

Thickness5%

“Very cheap thin card”

Size-Overall4%

“These are large boxes”

Adhesion/Stickiness3%

“some flimsy material which wouldnt stick with sellotape at all”

Advertised Vs Actual Product3%

“Not what I was expecting”

Top return reasons

Color28%

Quality-Overall19%

Size-Overall14%

Strength8%

Value For Money6%

Design-Overall4%

Inflation/Deflation4%

Brightness/Shine/Glow4%

Functionality-Overall4%