21 balloons
Skip itSoft demand (-11.6% this quarter) — this niche doesn't clear our bar today.
Conversion
Great8.2%search→purchase rate — share of searches ending in a sale
Competition
Great36%top-5 click share — an open shelf
Brand share
Great56%top-5 brand share — no brand owns this niche
Returns
Okay3.1%return rate — above 5% kills the launch gate
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Review moat
Okay2,168.16avg incumbent reviews — the moat a new listing must climb
Price range
Okay$4.93–$19.76cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Okay$117K$117K/yr · 191K searches
Avg price
Bad$7.46avg listing price — sweet spot $15–$100
Growth
Bad-11.6%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, 21 balloons is a $117K/yr Amazon United States market (191K searches/yr). The top 5 brands hold 56% of demand. Verdict: Skip it — 49/100.
Data updated Jul 10, 2026 · scored weekly · How we score niches
21 balloons market data
- Units sold / yr
- 13K–15K
- avg 250–500/product
- Revenue / yr
- $93K–$112K
- units × avg price
- Conversion rate
- 8.2%
- Avg BSR
- #584
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 98%
- Out of stock
- 2.2%
- Avg brand age
- 25 months
- Avg seller age
- 194 days
Competition & brand share
Clicks spread well past the top 5 (36% combined) — an open shelf where new products get seen.Brands
30 rising
Sellers
34
Top-5 brand share
56%
Top 20: 92%
Top-5 click share
36%
Top 20: 74%
Open market
39%
- Lingqiang16%
- COLORFUL ELVES11%
- AIQINHU11%
- KAINSY9%
- Scorpio9%
- LHOAVWE6%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -11.6% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.7×
Top 21 balloons search terms
- 21 balloons66K/yr
- 21st birthday balloons56K/yr
- 21 balloon15K/yr
- 21st balloons7K/yr
- 21 number balloons5K/yr
- 21st birthday balloon5K/yr
- 21 ballons4K/yr
- 21 birthday balloons3K/yr
- 21 balloon number31K/yr
Top 21 balloons 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.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Champagne Gold Large Number 21 Balloon 40 Inch Light Gold Foil Helium Number Balloons Giant Mylar Number 21 Balloons for 21 Years Old Birthday Party Anniversary Decorations (Champagne Gold 21)
AIQINHU$6.934.4★331 rev
40inch Jumbo Black 21 number balloons for 21st Birthday Decorations helium balloons party supplies use them as Props for Photos (Black 21)
Scorpio$6.064.6★1,235 rev
Silver 21 Number Balloons Big Giant Jumbo Large Number 21 Foil Mylar Balloons for Girl Women Men 21st Birthday Party Supplies 21 Anniversary Events Decorations-40 inch
COLORFUL ELVES$7.954.5★7,210 rev
Champagne Gold 21st Birthday Balloons for Her 40In Light Gold Foil Number 21 Balloons for Boys Girls Birthday Party Balloons Numbers 2 and 1 for Women Men 12th 21st Anniversary Decorations Supplies
Lingqiang$7.914.3★4,285 rev
Beige 21st Birthday Balloons Number 21 40 Inch Large Foil 1 & 2 Numbers Balloons for 21 Year Old Boys Girls Cream Giant Helium Balloon for Women Men 21st 12th Birthday Anniversary Party Decorations
KAINSY$6.974.4★592 rev
Newest
by launch date
4 Pcs Champagne Balloons Huge Rose Gold Champagne Bottle Goblet Aluminum Foil Balloons for Birthday Bachelorette Bridal Shower Wedding Anniversary Engagement Party Decorations Supplies
BSRESIN$6.79252 rev
Rose Gold 21st Birthday Decorations for Her 21 Balloon Number 40 Inch Champagne Balloon for Rose Gold Birthday Decorations Bachelorette Party Decor
TOPDAOYUN$8.396 rev
40 Inch 21 Number Balloon Black Birthday Decorations for Men Women Birthday Balloon for 12 21st Party Decor Anniversaries Celebration Party Graduation
Enyeopd$5.91752 rev
Big Number 21 Balloons Light Dusty Blue Foil 21 Balloon Numbers 40 Inch Giant 21st Birthday Party Decor Pastel Baby Sky Blue Mylar Helium Self Inflating Balloon for Boys Men Anniversary Decorations
Froova$7.90838 rev
Light Pink 21st Birthday Balloon for Women 40 Self Inflating Mylar Number 21 Balloons Big Blush Pastel Pink Foil 2 & 1 Helium Balloon for Her Boho Coquette 12th 21st Birthday Party Decorations
KAINSY$7.02592 rev
Trending
90-day click momentumChampagne Gold Large Number 21 Balloon 40 Inch Light Gold Foil Helium Number Balloons Giant Mylar Number 21 Balloons for 21 Years Old Birthday Party Anniversary Decorations (Champagne Gold 21)
AIQINHU$6.934.4★
Jonhamwelbor 21 Number Balloons Silver Giant Jumbo Big Large Number 21 Foil Mylar Balloons for 12th or 21st Birthday Party Supplies 12 or 21 Anniversary Events Decorations
Jonhamwelbor$7.954.5★
Big Number 21 Balloons Light Dusty Blue Foil 21 Balloon Numbers 40 Inch Giant 21st Birthday Party Decor Pastel Baby Sky Blue Mylar Helium Self Inflating Balloon for Boys Men Anniversary Decorations
Froova$7.904.4★
Beige 21st Birthday Balloons Number 21 40 Inch Large Foil 1 & 2 Numbers Balloons for 21 Year Old Boys Girls Cream Giant Helium Balloon for Women Men 21st 12th Birthday Anniversary Party Decorations
KAINSY$6.974.4★
40 Inch Number Balloons 12/21 Black Big Giant Jumbo Number Foil Mylar Balloons for 12th/21th Birthday Party Supplies Anniversary Events Decorations(black-12/21)
xiangsushijie$5.904.2★
What buyers say about 21 balloons
What buyers praise and complain about, mined from review topics.What buyers love
“the quality of these balloons are really good”
“Good size”
“the color was perfect”
“Just what I was looking for”
“Well worth it”
“Easy to install”
“Fun facts”
“Good Decor”
“Durable and great quality”
“Easy to inflate and super cute”
What buyers complain about
“Would not fully inflate”
“the balloons are bad quality”
“More green than tan”
“material easily torn”
“Waste of money”
“Deflating 22”
“Too big”
“had a chemical smell”
“the banner had mis information”
“Would have been great if we were able to use it but unfortunately we could not.”
Top return reasons
Common questions
- Is 21 balloons profitable to sell on Amazon United States?
- The niche generates $117K/yr across 51 tracked products. 0 of 6 products launched in the last 360 days are still selling. 90-day search growth is -11.6%. Flapen's verdict: Skip it (49/100).
- How competitive is the 21 balloons niche?
- 30 brands and 34 sellers compete. The top 5 products take 36% of clicks and top 5 brands hold 56% of demand.
- What do buyers complain about in 21 balloons?
- Top complaints mined from reviews: Inflation/Deflation, Quality-Overall, Color. The return rate is 3.1%.
- When does demand for 21 balloons peak?
- Demand is steady year-round — the busiest month runs 1.7× the quietest.
- What does it cost to enter the 21 balloons niche?
- Listings span $4.93–$19.76; the average listing price is $7.46 (sweet spot $15–$100). The average incumbent carries 2,168 reviews — the moat a new listing must climb.