21st birthday candles
Worth a lookShows no brand lock-in (top 5 brands take 41% of clicks), but prices mostly outside the sweet spot ($3.87–$15.53) keeps it on the watch list.
Brand share
Great41%top-5 brand share — no brand owns this niche
Competition
Great34%top-5 click share — an open shelf
Returns
Great1.7%return rate — above 5% kills the launch gate
Conversion
Great7.5%search→purchase rate — share of searches ending in a sale
Review moat
Good608.96avg incumbent reviews — the moat a new listing must climb
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Market size
Okay$107K$107K/yr · 201K searches
Growth
Bad-1.7%90-day search growth — must beat 0% to launch
Avg price
Bad$7.10avg listing price — sweet spot $15–$100
Price range
Bad$3.87–$15.53cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United States niche tracking, 21st birthday candles is a $107K/yr Amazon United States market (201K searches/yr). The top 5 brands hold 41% of demand. Verdict: Worth a look — 52/100.
Data updated Jul 31, 2026 · scored weekly · How we score niches
21st birthday candles market data
- Units sold / yr
- 13K–15K
- avg 250–500/product
- Revenue / yr
- $89K–$107K
- units × avg price
- Conversion rate
- 7.5%
- Avg BSR
- #503
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 85%
- Out of stock
- 4.7%
- Avg brand age
- 27 months
- Avg seller age
- 170 days
Competition & brand share
Clicks spread well past the top 5 (34% combined) — an open shelf where new products get seen.Brands
33 falling
Sellers
36
Top-5 brand share
41%
Top 20: 89%
Top-5 click share
34%
Top 20: 74%
Open market
52%
- Artensueno12%
- ROYOROYI10%
- Nuanchu7%
- Lecferrarc7%
- Goqaoix6%
- BOXOB6%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -1.7% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.6×
Top 21st birthday candles search terms
- 21st birthday candles62K/yr
- 21 candles44K/yr
- 21 candle21K/yr
- 21st birthday candle19K/yr
- 21 candles for cake20K/yr
- birthday candles 216K/yr
- 21 birthday candles6K/yr
- 21st birthday candles for her8K/yr
- 21st birthday candles for him6K/yr
- 21 birthday candle4K/yr
Top 21st birthday candles 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
ROYOROYI 21st Birthday Decorations Gold Number 21 Candles for Cake
ROYOROYI$4.754.7★204 rev
Nuanchu 21st Birthday Candles Happy Birthday Cake Number Candles Topper Decoration for Birthday Wedding Anniversary Celebration Favor 3.54 Inches Total Length (Champagne Gold)
Nuanchu$5.464.7★2,517 rev
Girls Birthday Number 21 Candles 2.95in Glitter Butterfly Happy Birthday Cake Toppers Pink Sequins Wedding Numeral Cupcake Decorations for Anniversary Celebration Party Supplies (21th)
BOXOB$6.964.7★75 rev
21st & 12th Birthday Candles Champagne Gold Number 21 12 Candle for Cake Happy Birthday Cake Topper Decoration for Birthday Anniversary Celebration Party Supplies
Artensueno$5.924.8★88 rev
21 Candles for Cake 12th Cake Topper Happy 21st Birthday Decorations for Him 21st Birthday Candles Black Happy 21st Birthday Cake Topper for Him Her 21 Anniversary Number 1 Candle Number 2 Candle
Goqaoix$5.104.7★104 rev
Newest
by launch date
YEAAGE Black Number 21 Candles 21st Birthday Decorations for Him & Her
YEAAGE$5.903 rev
A Tini Bit Older Birthday Candles A Tini Bit Older Party Decoration Supplies Birthday Number Candles for Cake Topper (Green Number 21)
Candoll$7.351 rev
NHJINX 21 Birthday Number Candle for Cake Glitter Number Candle with Gold Beads Decorative Cake Topper for Milestone Celebrations
NHJINX$7.867 rev
AndiluluBear Number 21 Birthday Candles 1.96 Inch Happy Birthday Cake Candles Cupcakes Topper Decoration for Birthday Party Wedding Anniversary Celebration Supplies (Black)
AndiluluBear$4.97156 rev
21st Birthday Cake Candles Beer Themed Cake Numbers Decorations Funny Party Topper Supplies for Men Beer Lover Birthday Celebration Gifts (21)
Goktvai$7.2235 rev
Trending
90-day click momentumA Tini Bit Older Birthday Candles A Tini Bit Older Party Decoration Supplies Birthday Number Candles for Cake Topper (Green Number 21)
Candoll$7.355.0★
YEAAGE Black Number 21 Candles 21st Birthday Decorations for Him & Her
YEAAGE$5.904.6★
Girls Number 21 Birthday Candles Pink Sequins Butterfly Birthday Candle Glitter Candle Cake Topper Cupcake Decorations Party Supplies
LASILE$6.494.6★
21 Candles 21st Birthday Decorations for Women White 21st Candle for Beige Birthday Decorations 21 Cake Topper for 21 Year Old Girl Cream Birthday Party Decor Party Supplies Favors(Number 21 Candle)
GloryMo$6.354.6★
NHJINX 21 Birthday Number Candle for Cake Glitter Number Candle with Gold Beads Decorative Cake Topper for Milestone Celebrations
NHJINX$7.865.0★
What buyers say about 21st birthday candles
What buyers praise and complain about, mined from review topics.What buyers love
“Other than that, the topper itself was nice and looked great”
“Beautiful candles”
“Perfect color”
“Great for the money”
“Looks just as advertised”
“was easy to use”
“They are durable”
“the perfect size”
“Cute cake topper”
“It also smells really good”
What buyers complain about
“Burns too quickly - poor quality”
“For some reason I thought they would be larger even though I checked the size”
“Then came totally off”
“I my opinion it was kind of cheap”
“Smelled really bad and I returned”
“They break too easily”
“looked like the design was just slapped on them”
“Was not properly advertised”
“The candles are very heavy”
“not usable”
Top return reasons
Common questions
- Is 21st birthday candles profitable to sell on Amazon United States?
- The niche generates $107K/yr across 47 tracked products. 1 of 14 products launched in the last 360 days are still selling. 90-day search growth is -1.7%. Flapen's verdict: Worth a look (52/100).
- How competitive is the 21st birthday candles niche?
- 33 brands and 36 sellers compete. The top 5 products take 34% of clicks and top 5 brands hold 41% of demand.
- What do buyers complain about in 21st birthday candles?
- Top complaints mined from reviews: Quality-Overall, Size-Overall, Durability. The return rate is 1.7%.
- When does demand for 21st birthday candles peak?
- Demand is steady year-round — the busiest month runs 1.6× the quietest.
- What does it cost to enter the 21st birthday candles niche?
- Listings span $3.87–$15.53; the average listing price is $7.10 (sweet spot $15–$100). The average incumbent carries 609 reviews — the moat a new listing must climb.