---
title: "11th Birthday Decorations — £65K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/home-garden/11th-birthday-decorations"
last_updated: "2026-07-31T07:22:13.014Z"
locale: en
meta:
description: "Niche score 57/100 · £65K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 57/100 · £65K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "11th Birthday Decorations — £65K/yr Amazon UK Niche (2026) - Flapen"
---
# **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.
Market size 16Growth 23Conversion 70Competition 92Returns 98Price range 22Avg price 23Brand share 96Review moat 91Quality gap 43
**Returns**
**Incredible****0.4%**
return rate — above 5% kills the launch gate
**Brand share**
**Incredible****32%**
top-5 brand share — no brand owns this niche
**Competition**
**Great****23%**
top-5 click share — an open shelf
**Review moat**
**Great****180.02**
avg incumbent reviews — the moat a new listing must climb
**Conversion**
**Good****6.4%**
search→purchase rate — share of searches ending in a sale
**Quality gap**
**Okay****4.5★**
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**](https://flapen.com/research/niches?market=uk&signal=no_dominant_brand "Top brand's click share < 20%") [** Low Review Barrier**](https://flapen.com/research/niches?market=uk&signal=low_review_barrier "Top brand's reviews < 500")
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 ~~](https://flapen.com/research/methodology)
## **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**
**71**
**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.
3K2KSpike '26 seasonJulAugSepOctNovDecJanFebMarAprMayJunJul
Peak months: Jan · busiest ÷ quietest = 2.0×
[**Open Trend **](https://flapen.com/research/uk/home-garden/11th-birthday-decorations/trend)
## **Top 11th birthday decorations search terms**
- **11th birthday decorations**69K/yr+5.0%3.7% conv. - **11th birthday**18K/yr-29.0%1.4% conv. - **11 birthday decorations**14K/yr+12.1%4.0% conv. - **11th birthday banner**9K/yr+5.0%6.5% conv. - **11th birthday decorations boy**8K/yr-37.2%3.9% conv. - **happy 11th birthday banner**6K/yr-6.5%6.1% conv. [**All search terms **](https://flapen.com/research/uk/home-garden/11th-birthday-decorations/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.
0%2%£1K4%£3K6%£4K8%£5K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**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**£12.37**4.6★7 rev](https://www.amazon.co.uk/dp/B0GJ4ZGWDY) [2**Happy 11th Birthday Banner Flashing Black Banners for Boys and Girls 11th Birthday Decorations (Age11)**Ethlomoer**£4.17**4.7★87 rev](https://www.amazon.co.uk/dp/B0FJFJYYY9) [3**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**£8.49**4.4★169 rev](https://www.amazon.co.uk/dp/B0G1MQLJ58) [4**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**£10.73**4.4★18 rev](https://www.amazon.co.uk/dp/B0G39DRW1B) [5**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**£7.54**4.2★146 rev](https://www.amazon.co.uk/dp/B0DJQH64WG)
**~~View all top sellers →~~**
### **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**£10.88**0 rev3mo ago](https://www.amazon.co.uk/dp/B0GWKP5M8J) [**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**£12.37**7 rev6mo ago](https://www.amazon.co.uk/dp/B0GJ4ZGWDY) [**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**£7.48**40 rev6mo ago](https://www.amazon.co.uk/dp/B0GDFTNXTK) [**Kradeler 11th Birthday Decorations Women Gold Birthday Banner Retro Pink Gold Latex Balloons Party Decorations Confetti Balloons for Women**Kradeler**£7.08**20 rev7mo ago](https://www.amazon.co.uk/dp/B0G9KTXTFB) [**11th Birthday Decoration for Girl Rose Gold Birthday Sash and Rhinestone Crown for Girls 11th Birthday Party Supplies**Leixi**£5.06**4 rev8mo ago](https://www.amazon.co.uk/dp/B0G481N8P7)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Kradeler 11th Birthday Decorations Women Gold Birthday Banner Retro Pink Gold Latex Balloons Party Decorations Confetti Balloons for Women**Kradeler**£7.08**4.5★**▲ 241%**](https://www.amazon.co.uk/dp/B0G9KTXTFB) [**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**£10.88**0.0★**▲ 238%**](https://www.amazon.co.uk/dp/B0GWKP5M8J) [**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**£7.48**3.8★**▲ 175%**](https://www.amazon.co.uk/dp/B0GDFTNXTK) [**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**£12.37**4.6★**▲ 171%**](https://www.amazon.co.uk/dp/B0GJ4ZGWDY) [**11th Birthday Decoration for Girl Rose Gold Birthday Sash and Rhinestone Crown for Girls 11th Birthday Party Supplies**Leixi**£5.06**4.8★**▲ 127%**](https://www.amazon.co.uk/dp/B0G481N8P7)
**~~View all trending →~~**
## **What buyers say about 11th birthday decorations**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Value For Money**20%
*“Well worth the money”*
**Quality-Overall**17%
*“Decent enough”*
**Gifting Purpose**16%
*“Great for birthday gift”*
**Design-Overall**11%
*“the design is also great”*
**Color**5%
*“The shades are classy and elegant”*
**Assembly/Installation**4%
*“very well put together”*
**Inflation/Deflation**4%
*“are easy to blow up with air or helium”*
**Advertised Vs Actual Product**3%
*“much better than I anticipated”*
**Temperature Retention**2%
*“you can use for hot or cold drinks very pleased”*
**Durability**2%
*“The balloons are pretty durable”*
### **What buyers complain about **
**Inflation/Deflation**14%
*“disappointed that one of the 'number one' balloons deflated overnight”*
**Smell**9%
*“Awful smell”*
**Leak-Proof**9%
*“1 leaked from the seals”*
**Value For Money**9%
*“This is the most worst £8 I've spent simply because I know i could have”*
**Certifications**9%
*“Not up to standards”*
**Color**9%
*“The white heart ballons are not white they pale colour”*
**Assembly/Installation**5%
*“You do need to put the banners together yourself, which is a bit fiddly”*
**Quality-Overall**5%
*“Not great quality”*
**Ease Of Use**5%
*“A little bit fiddly to string up”*
**Strength**1%
*“However, some pieces feel a bit flimsy”*
### **Top return reasons **
**Defective Material/Parts**18%
**Quality-Overall**18%
**Smell**9%
**Gifting Purpose**9%
**Value For Money**9%
**Functionality-Overall**9%
**Inflation/Deflation**9%
**Color**5%
**Size-Overall**5%
**Advertised Vs Actual Product**5%
## **Common questions**
- **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.
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