Is 11th birthday decorations profitable to sell on Amazon United Kingdom?

The niche generates £65K/yr across 83 tracked products. 0 of 49 products launched in the last 360 days are still selling. 90-day search growth is -3.8%. Flapen's verdict: Worth a look (57/100).

How competitive is the 11th birthday decorations niche?

46 brands and 71 sellers compete. The top 5 products take 23% of clicks and top 5 brands hold 32% of demand.

What do buyers complain about in 11th birthday decorations?

Top complaints mined from reviews: Inflation/Deflation, Smell, Leak-Proof. The return rate is 0.4%.

When does demand for 11th birthday decorations peak?

Demand peaks in Jan; the busiest month runs 2.0× the quietest.

What does it cost to enter the 11th birthday decorations niche?

Listings span £2.36–£18.62; the average listing price is £8.23 (sweet spot $15–$100). The average incumbent carries 180 reviews — the moat a new listing must climb.

11th birthday decorations

Worth a look

Shows low returns (0.4%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Returns

Incredible0.4%

return rate — above 5% kills the launch gate

Brand share

Incredible32%

top-5 brand share — no brand owns this niche

Competition

Great23%

top-5 click share — an open shelf

Review moat

Great180.02

avg incumbent reviews — the moat a new listing must climb

Conversion

Good6.4%

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

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Growth

Bad-3.8%

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

Avg price

Bad£8.23

avg listing price — sweet spot $15–$100

Price range

Bad£2.36–£18.62

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

Market size

Bad£65K

£65K/yr · 124K searches

Signals No Dominant Brand Low Review Barrier

According to Flapen's Amazon United Kingdom niche tracking, 11th birthday decorations is a £65K/yr Amazon United Kingdom market (124K searches/yr). The top 5 brands hold 32% of demand. Demand peaks in Jan. Verdict: Worth a look — 57/100.

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

11th birthday decorations market data

Units sold / yr: 6K–8K; avg 0–100/product
Revenue / yr: £49K–£66K; units × avg price
Conversion rate: 6.4%
Avg BSR: #553
Page quality: 0%
Prime: 100%
Sponsored: 94%
Out of stock: 6.4%
Avg brand age: 19 months
Avg seller age: 172 days

Competition & brand share

Clicks spread well past the top 5 (23% combined) — an open shelf where new products get seen.

Brands

46 falling

Sellers

Top-5 brand share

32%

Top 20: 78%

Top-5 click share

23%

Top 20: 55%

Open market

64%

Fuwane8%
JGIIIJLP8%
OakTree6%
DJLLA5%
Ethlomoer5%
British Ballet4%

Demand & seasonality

Weekly Amazon search volume, last 55 weeks — -3.8% search growth over the last 90 days.

Peak months: Jan · busiest ÷ quietest = 2.0×

Open Trend

Top 11th birthday decorations search terms

11th birthday decorations69K/yr +5.0%3.7% conv.
11th birthday18K/yr -29.0%1.4% conv.
11 birthday decorations14K/yr +12.1%4.0% conv.
11th birthday banner9K/yr +5.0%6.5% conv.
11th birthday decorations boy8K/yr -37.2%3.9% conv.
happy 11th birthday banner6K/yr -6.5%6.1% conv.

All search terms

Top 11th birthday decorations 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★)1 product missing review or click data not plotted

All 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

11th birthday decorations BRUH Im 11 Backdrop Happy 11th Birthday Banner Tablecloth 11th Birthday Balloons Birthday Decorations Hanging Swirls for 11 Years Old Birthday Party Supplies

Fuwane£12.374.6★7 rev

Happy 11th Birthday Banner Flashing Black Banners for Boys and Girls 11th Birthday Decorations (Age11)

Ethlomoer£4.174.7★87 rev

11th Birthday Decorations Girls 11th Birthday Banner Purple Fantasy Party Set Includes Number 11 Balloon Sash Cake Topper Banner Purple Flower Party Decorations for 11 Years Girls

Fantspati£8.494.4★169 rev

11th Birthday Decorations Balloons Boys - 28 Pcs Blue Bruh IM 11 Banner Swirl Hangings Latex Confetti Balloons Sash Cake Topper for Kids Boy 11 Years Old Birthday Party Decor Supplies

JGIIIJLP£10.734.4★18 rev

11th Birthday Decoration Purple Party Supplies Gift Balloon Set with Number 11 Foil Balloons Happy Birthday Banner Reusable Cake Topper Table Decor for Girls Boys 11 Years Celebration

Cnrose£7.544.2★146 rev

Newest

by launch date

11th Birthday Decorations Girls Kit - 27 Pcs Black Purple Happy 11th Birthday Banner Triangular Flag Hanging Swirls Backdrop Cake Topper 11 Balloon Set for 11 Years Old Party Decoration Supplies

YTEWFGL£10.880 rev

3mo ago

11th birthday decorations BRUH Im 11 Backdrop Happy 11th Birthday Banner Tablecloth 11th Birthday Balloons Birthday Decorations Hanging Swirls for 11 Years Old Birthday Party Supplies

Fuwane£12.377 rev

6mo ago

Pink Happy 11th Birthday Decorations Large Number Foil Balloon 21 Inch Pink Bow 16 Inch Happy Birthday Letter Balloons Banner with 18 Inch Heart Balloons for 11 Year Old Girls Party

Juivesia£7.4840 rev

6mo ago

Kradeler 11th Birthday Decorations Women Gold Birthday Banner Retro Pink Gold Latex Balloons Party Decorations Confetti Balloons for Women

Kradeler£7.0820 rev

7mo ago

11th Birthday Decoration for Girl Rose Gold Birthday Sash and Rhinestone Crown for Girls 11th Birthday Party Supplies

Leixi£5.064 rev

8mo ago

What buyers say about 11th birthday decorations

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

What buyers love

Value For Money20%

“Well worth the money”

Quality-Overall17%

“Decent enough”

Gifting Purpose16%

“Great for birthday gift”

Design-Overall11%

“the design is also great”

Color5%

“The shades are classy and elegant”

Assembly/Installation4%

“very well put together”

Inflation/Deflation4%

“are easy to blow up with air or helium”

Advertised Vs Actual Product3%

“much better than I anticipated”

Temperature Retention2%

“you can use for hot or cold drinks very pleased”

Durability2%

“The balloons are pretty durable”

What buyers complain about

Inflation/Deflation14%

“disappointed that one of the 'number one' balloons deflated overnight”

Smell9%

“Awful smell”

Leak-Proof9%

“1 leaked from the seals”

Value For Money9%

“This is the most worst £8 I've spent simply because I know i could have”

Certifications9%

“Not up to standards”

Color9%

“The white heart ballons are not white they pale colour”

Assembly/Installation5%

“You do need to put the banners together yourself, which is a bit fiddly”

Quality-Overall5%

“Not great quality”

Ease Of Use5%

“A little bit fiddly to string up”

Strength1%

“However, some pieces feel a bit flimsy”

Top return reasons

Defective Material/Parts18%

Quality-Overall18%

Smell9%

Gifting Purpose9%

Value For Money9%

Functionality-Overall9%

Inflation/Deflation9%