18th birthday sash
Skip itSoft demand (-30.5% this quarter) — this niche doesn't clear our bar today.
Review moat
Good948.24avg incumbent reviews — the moat a new listing must climb
Conversion
Good4.3%search→purchase rate — share of searches ending in a sale
Brand share
Good74%top-5 brand share — brands hold most of the demand
Competition
Okay64%top-5 click share — leaders hold, buyers still browse
Returns
Okay4.6%return rate — above 5% kills the launch gate
Avg price
Okay$9.73avg listing price — sweet spot $15–$100
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Price range
Bad$5.78–$16.60cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Bad$42K$42K/yr · 100K searches
Growth
Bad-30.5%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, 18th birthday sash is a $42K/yr Amazon United States market (100K searches/yr). The top 5 brands hold 74% of demand. Demand peaks in Jan. Verdict: Skip it — 29/100.
Data updated Jul 13, 2026 · scored weekly · How we score niches
18th birthday sash market data
- Units sold / yr
- 5K–6K
- avg 100–250/product
- Revenue / yr
- $49K–$58K
- units × avg price
- Conversion rate
- 4.3%
- Avg BSR
- #2,265
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 90%
- Out of stock
- 0.0%
- Avg brand age
- 26 months
- Avg seller age
- 168 days
Competition & brand share
The top 5 products take 64% of clicks — established leaders, but buyers still shop beyond them.Brands
16 falling
Sellers
18
Top-5 brand share
74%
Top 20: 100%
Top-5 click share
64%
Top 20: 100%
Open market
22%
- CAVETEE30%
- Docooniver23%
- Semato11%
- Juesly5%
- CIEHER5%
- Awfrky4%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -30.5% search growth over the last 90 days.Peak months: Jan · busiest ÷ quietest = 1.9×
Top 18th birthday sash search terms
- 18th birthday sash50K/yr
- 18th birthday crown19K/yr
- 18th birthday sash and crown15K/yr
- 18th birthday tiara9K/yr
- 18th birthday crown and sash8K/yr
Top 18th birthday sash 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 21 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
CAVETEE 18th Birthday Crown and Sash Set for Girls and Women - Rhinestone Tiara Party Decorations
CAVETEE$8.954.7★235 rev
Docooniver Its My 18th Birthday Sash White with Rose Gold Foil Lettering for Girls.
Docooniver$5.974.7★1,460 rev
Semato 18th Birthday Decorations for Girls 18th Birthday Crown and Sash Gifts for Girls Party Supplies and Favors
Semato$8.684.6★45 rev
Crown and Pearl Pin Set for 18th Birthday - Its My 18th Birthday Sash Tiara Cake Topper Decorations and Gift for Her
CIEHER$9.824.8★6,317 rev
Semato 18th Birthday Decorations for Girls Silver 18th Birthday Crown and Sash Gifts for Girls Party Supplies and Favors
Semato$8.944.6★45 rev
Newest
by launch date
Semato 18th Birthday Decorations for Her Sash and Crown Tiara Kit Rose Gold 18th Birthday Gifts for Girls Party Supplies
Semato$12.72239 rev
18th Birthday Decorations for Girls with 18th Birthday Sash and Tiara Gold 18 Candles Gold 18 Year Old Gifts for Girls
Juesly$9.651,096 rev
Araluky Pink Happy 18th Birthday Decorations for Girls 18th Brthday Sash and Crown for 18 Birthday Gifts for Girls
Araluky$10.1216 rev
Amariver 18th Birthday Crown and Sash for Girls 18th Birthday Decoration 18th Rose Gold Tiara and Its My 18thBirthday Sash 18th Party Gifts Party Supplies
Amariver$9.9813 rev
18th Birthday Decorations for Girls with 18th Birthday Sash White and Tiara Gold Number Candles Gold 18 Year Old Girl Gifts
Juesly$9.741,096 rev
Trending
90-day click momentumSemato 18th Birthday Decorations for Her Sash and Crown Tiara Kit Rose Gold 18th Birthday Gifts for Girls Party Supplies
Semato$12.724.8★
COCIDE BIRTHDAY GIRL Sash for Women Happy Birthday Sashes and Crowns for Girls Crystal Tiaras for Princess Silver Party Decoration for Gift Headband Supplies Accessories Favors
COCIDE$12.034.5★
Docooniver Its My 18th Birthday Sash White with Rose Gold Foil Lettering for Girls.
Docooniver$5.974.7★
COCIDE BIRTHDAY QUEEN Birthday Sash for Women Tiaras for Girls Decorations Set Rhinestone Headband Hair Accessories Glitter Crown for Party Supplies
COCIDE$11.244.7★
CAVETEE 18th Birthday Crown and Sash Set for Girls and Women - Rhinestone Tiara Party Decorations
CAVETEE$8.954.7★
What buyers say about 18th birthday sash
What buyers praise and complain about, mined from review topics.What buyers love
“Good quality”
“Decent item at a decent price”
“Better than described”
“the tiara is very sturdy”
“It fits”
“Major sparkle”
“Great material”
“The color was very pretty”
“It was beautiful and heavy”
“It was durable”
What buyers complain about
“Very very heavy”
“Trash”
“Looks Expensive”
“and was missing rhinestones as well”
“These candles are super tiny”
“Not durable”
“glitter gets everywhere”
“difficult to keep on”
“the crown was so uneven”
“it did start to feel a little itchy on my skin”
Top return reasons
Common questions
- Is 18th birthday sash profitable to sell on Amazon United States?
- The niche generates $42K/yr across 21 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is -30.5%. Flapen's verdict: Skip it (29/100).
- How competitive is the 18th birthday sash niche?
- 16 brands and 18 sellers compete. The top 5 products take 64% of clicks and top 5 brands hold 74% of demand.
- What do buyers complain about in 18th birthday sash?
- Top complaints mined from reviews: Weight Heavy, Quality-Overall, Value For Money. The return rate is 4.6%.
- When does demand for 18th birthday sash peak?
- Demand peaks in Jan; the busiest month runs 1.9× the quietest.
- What does it cost to enter the 18th birthday sash niche?
- Listings span $5.78–$16.60; the average listing price is $9.73 (sweet spot $15–$100). The average incumbent carries 948 reviews — the moat a new listing must climb.